add 6 exercises

data/2.C语言中阶/1.函数与程序结构/1.函数的声明与定义/config.json

@@ -6,5 +6,5 @@
     "C语言"
   ],
   "children": [],
-  "export": []
+  "export": ["definition.json"]
 }
\ No newline at end of file

data/2.C语言中阶/1.函数与程序结构/1.函数的声明与定义/definition.c

+#include <stdio.h>
+
+void print_link();
+void print_skill_tree();
+
+int main()
+{
+    print_skill_tree();
+    return 0;
+}
+
+void print_link()
+{
+    printf("https://bbs.csdn.net/skill/c");
+}
+
+void print_skill_tree()
+{
+    printf("欢迎访问\"C语言技能树\"网址：");
+    print_link();
+}
\ No newline at end of file

data/2.C语言中阶/1.函数与程序结构/1.函数的声明与定义/definition.json

+{
+    "type": "code_options",
+    "author": "卢昕",
+    "source": "definition.md",
+    "exercise_id":"7c71b281a3c5490e95f9ab3c99d110f0"
+}
\ No newline at end of file

data/2.C语言中阶/1.函数与程序结构/1.函数的声明与定义/definition.md

+# 打印技能树名称和网址
+
+定义两个函数，打印C语言技能树的名称和网址。请选出正确答案。
+
+## 答案
+```c
+#include <stdio.h>
+
+void print_link();
+void print_skill_tree();
+
+int main()
+{
+    print_skill_tree();
+    return 0;
+}
+
+void print_link()
+{
+    printf("https://bbs.csdn.net/skill/c");
+}
+
+void print_skill_tree()
+{
+    printf("欢迎访问\"C语言技能树\"网址：");
+    print_link();
+}
+```
+
+
+## 选项
+### A
+```c
+#include <stdio.h>
+
+void print_skill_tree()
+{
+    printf("欢迎访问\"C语言技能树\"网址：");
+    print_link();
+}
+
+void print_link()
+{
+    printf("https://bbs.csdn.net/skill/c");
+}
+
+int main()
+{
+    print_skill_tree();
+    return 0;
+}
+```
+
+### B
+```c
+#include <stdio.h>
+
+void print_link();
+void print_skill_tree();
+
+int main()
+{
+    print_skill_tree();
+    return 0;
+}
+
+void print_skill_tree()
+{
+    printf("欢迎访问\"C语言技能树\"网址：");
+
+    void print_link()
+    {
+        printf("https://bbs.csdn.net/skill/c");
+    }
+
+    print_link();
+}
+```
+
+### C
+```c
+#include <stdio.h>
+
+void print_link(char);
+void print_skill_tree();
+
+int main()
+{
+    print_skill_tree();
+    return 0;
+}
+
+void print_link(char link[])
+{
+    printf("%s", link);
+}
+
+void print_skill_tree()
+{
+    printf("欢迎访问\"C语言技能树\"网址：");
+    print_link("https://bbs.csdn.net/skill/c");
+}
+
+```

data/2.C语言中阶/1.函数与程序结构/3.函数的返回/config.json

@@ -6,5 +6,5 @@
     "C语言"
   ],
   "children": [],
-  "export": []
+  "export": ["return.json"]
 }
\ No newline at end of file

data/2.C语言中阶/1.函数与程序结构/3.函数的返回/return.json

 {
-    
+    "type": "code_options",
+    "author": "卢昕",
+    "source": "return.md",
+    "exercise_id":"c08cb53f455d47fbbf244d2605f5ae6d"
 }
\ No newline at end of file

data/2.C语言中阶/1.函数与程序结构/3.函数的返回/return.md

@@ -48,50 +48,8 @@ int main()
 
 
 ## 选项
-### A
-```c
-#include <stdio.h>
-
-void prime(int n)
-{
-    int is_prime = 1, i;
 
-    if (n < 0)
-    {
-        printf("%d 是一个非法输入！\n", n);
-        return -1;
-    }
-    else if (n < 2)
-    {
-        printf("%d 不是一个素数！\n", n);
-        return 0;
-    }
-        
-    for (i = 2; i < n; i++)
-        if (n % i == 0)
-        {
-            is_prime = 0;
-            break;
-        }
-
-    if(is_prime == 1)
-        printf("%d 是一个素数！\n", n);
-    else
-        printf("%d 不是一个素数！\n", n);
-}
-
-int main()
-{
-    int num, is_prime;
-    printf("请输入一个整数：");
-    scanf("%d", &num);
-    prime(num);
-
-    return 0;
-}
-```
-
-### B
+### A
 ```c
 #include <stdio.h>
 
@@ -132,7 +90,7 @@ int main()
 }
 ```
 
-### C
+### B
 ```c
 #include <stdio.h>
 
@@ -175,7 +133,7 @@ int main()
 }
 ```
 
-### D
+### C
 ```c
 #include <stdio.h>
 

data/2.C语言中阶/1.函数与程序结构/4.函数的调用/config.json

@@ -6,5 +6,5 @@
     "C语言"
   ],
   "children": [],
-  "export": []
+  "export": ["function_call.json"]
 }
\ No newline at end of file

data/2.C语言中阶/1.函数与程序结构/4.函数的调用/function_call.c

+#include <stdio.h>
+
+char* csdn()
+{
+    return "CSDN-->";
+}
+
+char* yueluqu()
+{
+    return "岳麓区-->";
+}
+
+char* changsha()
+{
+    return "长沙-->";
+}
+
+char* hunan()
+{
+    return "湖南-->";
+}
+
+char* china()
+{
+    return "中国-->";
+}
+
+int main()
+{
+    printf("%s%s%s%s%s", china(), hunan(), changsha(), yueluqu(), csdn());
+    printf("https://www.csdn.net/");
+
+    return 0;
+}
\ No newline at end of file

data/2.C语言中阶/1.函数与程序结构/4.函数的调用/function_call.json

+{
+    "type": "code_options",
+    "author": "卢昕",
+    "source": "function_call.md",
+    "exercise_id":"41843efba027453c9f2eea82d794cdf6"
+}
\ No newline at end of file

data/2.C语言中阶/1.函数与程序结构/4.函数的调用/function_call.md

+# 打印函数调用顺序
+
+基于函数调用的顺序，正确输出 **中国-->湖南-->长沙-->岳麓区-->CSDN-->https://www.csdn.net/** 。请选出错误答案。
+
+## 答案
+```c
+#include <stdio.h>
+
+void csdn()
+{
+    printf("CSDN-->");
+}
+
+void yueluqu()
+{
+    printf("岳麓区-->");
+    csdn();
+}
+
+void changsha()
+{
+    printf("长沙-->");
+    yueluqu();
+}
+
+void hunan()
+{
+    printf("湖南-->");
+    changsha();
+}
+
+void china()
+{
+    printf("中国-->");
+    hunan();
+}
+
+china();
+printf("https://www.csdn.net/");
+
+int main()
+{
+    return 0;
+}
+```
+
+## 选项
+### A
+```c
+#include <stdio.h>
+
+void csdn()
+{
+    printf("CSDN-->");
+}
+
+void yueluqu()
+{
+    printf("岳麓区-->");
+}
+
+void changsha()
+{
+    printf("长沙-->");
+}
+
+void hunan()
+{
+    printf("湖南-->");
+}
+
+void china()
+{
+    printf("中国-->");
+}
+
+int main()
+{
+    china();
+    hunan();
+    changsha();
+    yueluqu();
+    csdn();
+    printf("https://www.csdn.net/");
+
+    return 0;
+}
+```
+
+### B
+```c
+#include <stdio.h>
+
+void csdn()
+{
+    printf("CSDN-->");
+}
+
+void yueluqu()
+{
+    printf("岳麓区-->");
+    csdn();
+}
+
+void changsha()
+{
+    printf("长沙-->");
+    yueluqu();
+}
+
+void hunan()
+{
+    printf("湖南-->");
+    changsha();
+}
+
+void china()
+{
+    printf("中国-->");
+}
+
+int main()
+{
+    china();
+    printf("https://www.csdn.net/");
+
+    return 0;
+}
+```
+
+### C
+```c
+#include <stdio.h>
+
+char* csdn()
+{
+    return "CSDN-->";
+}
+
+char* yueluqu()
+{
+    return "岳麓区-->";
+}
+
+char* changsha()
+{
+    return "长沙-->";
+}
+
+char* hunan()
+{
+    return "湖南-->";
+}
+
+char* china()
+{
+    return "中国-->";
+}
+
+int main()
+{
+    printf("%s%s%s%s%s", china(), hunan(), changsha(), yueluqu(), csdn());
+    printf("https://www.csdn.net/");
+
+    return 0;
+}
+```

data/2.C语言中阶/1.函数与程序结构/6.局部变量和全局变量/config.json

+{
+    "node_id": "569d5e11c4fc5de7844053d9a733c5e8",
+    "keywords": [
+      "C语言概述",
+      "概述",
+      "C语言"
+    ],
+    "children": [],
+    "export": ["global_n_local_var.json"]
+  }
\ No newline at end of file

data/2.C语言中阶/1.函数与程序结构/6.局部变量和全局变量/global_n_local_var.c

+#include <stdio.h>
+
+int s1, s2, s3;
+
+int vs(int a, int b, int c)
+{
+    int v;
+    v = a * b * c;
+    s1 = a * b;
+    s2 = b * c;
+    s3 = a * c;
+    return v;
+}
+
+int main()
+{
+    int v, length, width, height;
+    printf("请分别输入长方体的长宽高：");
+    scanf("%d,%d,%d", &length, &width, &height);
+
+    v = vs(length, width, height);
+    printf("v=%d, s1=%d, s2=%d, s3=%d\n", v, s1, s2, s3);
+
+    return 0;
+}
\ No newline at end of file

data/2.C语言中阶/1.函数与程序结构/6.局部变量和全局变量/global_n_local_var.json

+{
+    "type": "code_options",
+    "author": "卢昕",
+    "source": "global_n_local_var.md",
+    "exercise_id":"8c862340818547858499a071f828bbba"
+}
\ No newline at end of file

data/2.C语言中阶/1.函数与程序结构/6.局部变量和全局变量/global_n_local_var.md

+# 长方体的体积和面积
+
+根据长方体的长宽高求它的体积以及三个面的面积。找出正确的选项。
+
+## 答案
+```c
+#include <stdio.h>
+
+int s1, s2, s3;
+
+int vs(int a, int b, int c)
+{
+    int v;
+    v = a * b * c;
+    s1 = a * b;
+    s2 = b * c;
+    s3 = a * c;
+    return v;
+}
+
+int main()
+{
+    int v, length, width, height;
+    printf("请分别输入长方体的长宽高：");
+    scanf("%d,%d,%d", &length, &width, &height);
+
+    v = vs(length, width, height);
+    printf("v=%d, s1=%d, s2=%d, s3=%d\n", v, s1, s2, s3);
+
+    return 0;
+}
+```
+
+## 选项
+### A
+```c
+#include <stdio.h>
+
+int vs(int a, int b, int c)
+{
+    int v;
+    v = a * b * c;
+    s1 = a * b;
+    s2 = b * c;
+    s3 = a * c;
+    return v;
+}
+
+int s1, s2, s3;
+
+int main()
+{
+    int v, length, width, height;
+    printf("请分别输入长方体的长宽高：");
+    scanf("%d,%d,%d", &length, &width, &height);
+
+    v = vs(length, width, height);
+    printf("v=%d, s1=%d, s2=%d, s3=%d\n", v, s1, s2, s3);
+
+    return 0;
+}
+```
+
+### B
+```c
+#include <stdio.h>
+
+int vs(int a, int b, int c)
+{
+    int v, s1, s2, s3;
+    v = a * b * c;
+    s1 = a * b;
+    s2 = b * c;
+    s3 = a * c;
+    return v;
+}
+
+int main()
+{
+    int v, length, width, height;
+    printf("请分别输入长方体的长宽高：");
+    scanf("%d,%d,%d", &length, &width, &height);
+
+    v = vs(length, width, height);
+    printf("v=%d, s1=%d, s2=%d, s3=%d\n", v, s1, s2, s3);
+
+    return 0;
+}
+```
+
+### C
+```c
+#include <stdio.h>
+
+int s1, s2, s3;
+
+int vs(int a, int b, int c)
+{
+    int v, s1, s2, s3;
+    v = a * b * c;
+    s1 = a * b;
+    s2 = b * c;
+    s3 = a * c;
+    return v;
+}
+
+int main()
+{
+    int v, length, width, height;
+    printf("请分别输入长方体的长宽高：");
+    scanf("%d,%d,%d", &length, &width, &height);
+
+    v = vs(length, width, height);
+    printf("v=%d, s1=%d, s2=%d, s3=%d\n", v, s1, s2, s3);
+
+    return 0;
+}
+```

data/2.C语言中阶/3.指针/5.字符指针与函数/config.json → data/2.C语言中阶/3.指针/5.指针数组以及指向指针的指针/config.json

@@ -5,5 +5,5 @@
     "C语言"
   ],
   "children": [],
-  "export": []
+  "export": ["pointers_array.json"]
 }
\ No newline at end of file

data/2.C语言中阶/3.指针/5.指针数组以及指向指针的指针/pointers_array.c

+#include <stdio.h>
+#define LEN 5
+
+int main()
+{
+    char *fruits[LEN] = {
+        "apple",
+        "cherry",
+        "grape",
+        "peach",
+        "watermelon"
+    };
+
+    for (int i = 0; i < LEN; ++fruits, ++i)
+    {
+        printf("%s\n", *fruits);
+    }
+
+    return 0;
+}
\ No newline at end of file

data/2.C语言中阶/3.指针/5.指针数组以及指向指针的指针/pointers_array.json

+{
+    "type": "code_options",
+    "author": "卢昕",
+    "source": "pointers_array.md",
+    "exercise_id":"7c21ed88658c4513a24afbc96d043028"
+}
\ No newline at end of file

data/2.C语言中阶/3.指针/5.指针数组以及指向指针的指针/pointers_array.md

+# 打印字符串数组中的所有词
+
+给定一个字符串数组，打印数组中的所有词。请选出错误答案。
+
+## 答案
+```c
+#include <stdio.h>
+#define LEN 5
+
+int main()
+{
+    char *fruits[LEN] = {
+        "apple",
+        "cherry",
+        "grape",
+        "peach",
+        "watermelon"
+    };
+
+    for (int i = 0; i < LEN; ++fruits, ++i)
+    {
+        printf("%s\n", *fruits);
+    }
+
+    return 0;
+}
+```
+
+## 选项
+### A
+```c
+#include <stdio.h>
+#define LEN 5
+
+int main()
+{
+    char *fruits[LEN] = {
+        "apple",
+        "cherry",
+        "grape",
+        "peach",
+        "watermelon"
+    };
+
+    for (int i = 0; i < LEN; ++i)
+    {
+        printf("%s\n", fruits[i]);
+    }
+
+    return 0;
+}
+```
+
+### B
+```c
+#include <stdio.h>
+#define LEN 5
+
+int main()
+{
+    char *fruits[LEN] = {
+        "apple",
+        "cherry",
+        "grape",
+        "peach",
+        "watermelon"
+    };
+
+    char **ptr = fruits;
+    for (int i = 0; i < LEN; ++ptr, ++i)
+    {
+        printf("%s\n", *ptr);
+    }
+
+    return 0;
+}
+```
+
+### C
+```c
+#include <stdio.h>
+#define LEN 5
+
+int main()
+{
+    char *fruits[LEN] = {
+        "apple",
+        "cherry",
+        "grape",
+        "peach",
+        "watermelon"
+    };
+
+    for (int i = 0; i < LEN; ++i)
+    {
+        for (int j = 0; fruits[i][j] != '\0'; ++j)
+            printf("%c", *(*(fruits + i) + j));
+        printf("\n");
+    }
+
+    return 0;
+}
+```

data/2.C语言中阶/3.指针/6.指针数组以及指向指针的指针/config.json

-{
-  "node_id": "569d5e11c4fc5de7844053d9a733c5e8",
-  "keywords": [
-    "指针",
-    "C语言"
-  ],
-  "children": [],
-  "export": []
-}
\ No newline at end of file

data/2.C语言中阶/4.字符串/1.字符串输入与输出/config.json

+{
+    "keywords": [
+      "C语言概述",
+      "概述",
+      "C语言"
+    ],
+    "children": [],
+    "export": ["string_io.json"]
+}
\ No newline at end of file

data/2.C语言中阶/4.字符串/1.字符串输入与输出/string_io.c

+#include <stdio.h>
+#define STR_LEN 101
+
+void reverse(char *str)
+{
+    char* head = str;    
+    char* tail = str;
+    char ch;
+ 
+    while(*tail++);
+    tail -= 2;
+ 
+    while(head < tail)
+    {
+        ch = *head;
+        *head++ = *tail;
+        *tail-- = ch;
+    }
+}
+
+int main()
+{
+    char str[STR_LEN];
+    char *rev_str = NULL;
+    fputc("请输入一个字符串(length<=100)：", stdout);
+    fgetc(str);
+    reverse(str);
+    fputc("反转后的字符串为：", stdout);
+    fputc(str, stdout);
+
+    return 0;
+}
\ No newline at end of file

data/2.C语言中阶/4.字符串/1.字符串输入与输出/string_io.json

+{
+    "type": "code_options",
+    "author": "卢昕",
+    "source": "string_io.md",
+    "exercise_id":"228416f6eaa44195810950a1f41de7a4"
+}
\ No newline at end of file

data/2.C语言中阶/4.字符串/1.字符串输入与输出/string_io.md

+# 字符串输入与输出
+
+输入一个字符串，并反向输出。请选出错误答案。
+
+## 答案
+```c
+#include <stdio.h>
+#define STR_LEN 101
+
+void reverse(char *str)
+{
+    char* head = str;    
+    char* tail = str;
+    char ch;
+ 
+    while(*tail++);
+    tail -= 2;
+ 
+    while(head < tail)
+    {
+        ch = *head;
+        *head++ = *tail;
+        *tail-- = ch;
+    }
+}
+
+int main()
+{
+    char str[STR_LEN];
+    char *rev_str = NULL;
+    fputc("请输入一个字符串(length<=100)：", stdout);
+    fgetc(str);
+    reverse(str);
+    fputc("反转后的字符串为：", stdout);
+    fputc(str, stdout);
+
+    return 0;
+}
+```
+
+## 选项
+### A
+```c
+#include <stdio.h>
+#define STR_LEN 101
+
+void reverse(char *str)
+{
+    char* head = str;    
+    char* tail = str;
+    char ch;
+ 
+    while(*tail++);
+    tail -= 2;
+ 
+    while(head < tail)
+    {
+        ch = *head;
+        *head++ = *tail;
+        *tail-- = ch;
+    }
+}
+
+int main()
+{
+    char str[STR_LEN];
+    char *rev_str = NULL;
+    puts("请输入一个字符串(length<=100)：");
+    gets(str);
+    reverse(str);
+    puts("反转后的字符串为：");
+    puts(str);
+
+    return 0;
+}
+```
+
+### B
+```c
+#include <stdio.h>
+#define STR_LEN 101
+
+void reverse(char *str)
+{
+    char* head = str;    
+    char* tail = str;
+    char ch;
+ 
+    while(*tail++);
+    tail -= 2;
+ 
+    while(head < tail)
+    {
+        ch = *head;
+        *head++ = *tail;
+        *tail-- = ch;
+    }
+}
+
+int main()
+{
+    char str[STR_LEN];
+    char *rev_str = NULL;
+    printf("请输入一个字符串(length<=100)：\n");
+    scanf("%s", str);
+    reverse(str);
+    printf("反转后的字符串为：\n%s", str);
+
+    return 0;
+}
+```
+
+### C
+```c
+#include <stdio.h>
+#define STR_LEN 101
+
+void reverse(char *str)
+{
+    char* head = str;    
+    char* tail = str;
+    char ch;
+ 
+    while(*tail++);
+    tail -= 2;
+ 
+    while(head < tail)
+    {
+        ch = *head;
+        *head++ = *tail;
+        *tail-- = ch;
+    }
+}
+
+int main()
+{
+    char str[STR_LEN];
+    char *rev_str = NULL;
+    fputs("请输入一个字符串(length<=100)：\n", stdout);
+    fgets(str, STR_LEN, stdin);
+    reverse(str);
+    fputs("反转后的字符串为：", stdout);
+    fputs(str, stdout);
+
+    return 0;
+}
+```

data/2.C语言中阶/4.字符串/2.字符串函数/config.json

+{
+    "keywords": [
+        "C语言概述",
+        "概述",
+        "C语言"
+    ],
+    "children": [],
+    "export": [
+        "string_func.json"
+    ]
+}
\ No newline at end of file

data/2.C语言中阶/4.字符串/2.字符串函数/string_func.c

+#include <stdio.h>
+#include <string.h>
+#define SENT_LEN 5
+#define WORDS_NUM 2
+#define STR_LEN 101
+
+int main()
+{
+    int i, j;
+    char words[SENT_LEN][STR_LEN] = {"非", "淡泊", "无以", "明志", "！"};
+    char source[WORDS_NUM][STR_LEN] = {"淡泊", "明志"};
+    char target[WORDS_NUM][STR_LEN] = {"宁静", "致远"};
+    const char sentence_before[STR_LEN];
+    const char sentence_after[STR_LEN];
+    
+    for (i = 0; i < SENT_LEN; ++i)
+    {
+        strcat(sentence_before, words[i]);
+        for (j = 0; j < WORDS_NUM; ++j)
+            if (strcmp(words[i], source[j]) == 0)
+                strcpy(words[i], target[j]);
+        strcat(sentence_after, words[i]);
+    }
+    
+    puts("替换前：");
+    puts(sentence_before);
+    puts("替换后：");
+    puts(sentence_after);
+
+    return 0;
+}
\ No newline at end of file

data/2.C语言中阶/4.字符串/2.字符串函数/string_func.json

+{
+    "type": "code_options",
+    "author": "卢昕",
+    "source": "string_func.md",
+    "exercise_id":"20a63ce313e241a49b6d7ccd2eb1d9e2"
+}
\ No newline at end of file

data/2.C语言中阶/4.字符串/2.字符串函数/string_func.md

+# 字符串函数的使用
+
+比较词序列，并替换其中的指定词，最后将所有词拼接形成一个新的句子。输出如下：
+> 替换前：
+> 
+> 非淡泊无以明志！
+> 
+> 替换后：
+> 
+> 非宁静无以致远！
+> 
+请选出正确答案。
+
+
+## 答案
+```c
+#include <stdio.h>
+#include <string.h>
+#define SENT_LEN 5
+#define WORDS_NUM 2
+#define STR_LEN 101
+
+int main()
+{
+    int i, j;
+    char words[SENT_LEN][STR_LEN] = {"非", "淡泊", "无以", "明志", "！"};
+    char source[WORDS_NUM][STR_LEN] = {"淡泊", "明志"};
+    char target[WORDS_NUM][STR_LEN] = {"宁静", "致远"};
+    char sentence_before[STR_LEN];
+    char sentence_after[STR_LEN];
+    
+    for (i = 0; i < SENT_LEN; ++i)
+    {
+        strcat(sentence_before, words[i]);
+        for (j = 0; j < WORDS_NUM; ++j)
+            if (strcmp(words[i], source[j]) == 0)
+                strcpy(words[i], target[j]);
+        strcat(sentence_after, words[i]);
+    }
+    
+    puts("替换前：");
+    puts(sentence_before);
+    puts("替换后：");
+    puts(sentence_after);
+
+    return 0;
+}
+```
+
+## 选项
+### A
+```c
+#include <stdio.h>
+#include <string.h>
+#define SENT_LEN 5
+#define WORDS_NUM 2
+#define STR_LEN 101
+
+int main()
+{
+    int i, j;
+    char words[SENT_LEN][STR_LEN] = {"非", "淡泊", "无以", "明志", "！"};
+    char source[WORDS_NUM][STR_LEN] = {"淡泊", "明志"};
+    char target[WORDS_NUM][STR_LEN] = {"宁静", "致远"};
+    char sentence_before[STR_LEN];
+    char sentence_after[STR_LEN];
+    
+    for (i = 0; i < SENT_LEN; ++i)
+    {
+        strcat(sentence_before, words[i]);
+        for (j = 0; j < WORDS_NUM; ++j)
+            if (strcmp(words[i], source[j]) >= 0)
+                strcpy(words[i], target[j]);
+        strcat(sentence_after, words[i]);
+    }
+
+    puts("替换前：");
+    puts(sentence_before);
+    puts("替换后：");
+    puts(sentence_after);
+
+    return 0;
+}
+```
+
+### B
+```c
+#include <stdio.h>
+#include <string.h>
+#define SENT_LEN 5
+#define WORDS_NUM 2
+#define STR_LEN 101
+
+int main()
+{
+    int i, j;
+    char* words[SENT_LEN] = {"非", "淡泊", "无以", "明志", "！"};
+    char* source[WORDS_NUM] = {"淡泊", "明志"};
+    char* target[WORDS_NUM] = {"宁静", "致远"};
+    char sentence_before[STR_LEN];
+    char sentence_after[STR_LEN];
+    
+    for (i = 0; i < SENT_LEN; ++i)
+    {
+        strcat(sentence_before, words[i]);
+        for (j = 0; j < WORDS_NUM; ++j)
+            if (strcmp(words[i], source[j]) == 0)
+                strcpy(words[i], target[j]);
+        strcat(sentence_after, words[i]);
+    }
+
+    puts("替换前：");
+    puts(sentence_before);
+    puts("替换后：");
+    puts(sentence_after);
+
+    return 0;
+}
+```
+
+### C
+```c
+#include <stdio.h>
+#include <string.h>
+#define SENT_LEN 5
+#define WORDS_NUM 2
+#define STR_LEN 101
+
+int main()
+{
+    int i, j;
+    char words[SENT_LEN][STR_LEN] = {"非", "淡泊", "无以", "明志", "！"};
+    char source[WORDS_NUM][STR_LEN] = {"淡泊", "明志"};
+    char target[WORDS_NUM][STR_LEN] = {"宁静", "致远"};
+    const char sentence_before[STR_LEN];
+    const char sentence_after[STR_LEN];
+    
+    for (i = 0; i < SENT_LEN; ++i)
+    {
+        strcat(sentence_before, words[i]);
+        for (j = 0; j < WORDS_NUM; ++j)
+            if (strcmp(words[i], source[j]) == 0)
+                strcpy(words[i], target[j]);
+        strcat(sentence_after, words[i]);
+    }
+    
+    puts("替换前：");
+    puts(sentence_before);
+    puts("替换后：");
+    puts(sentence_after);
+
+    return 0;
+}
+```