opt Hello World

data/1.C语言初阶/1.C语言概述/1.C语言发展史/helloworld.c

@@ -2,6 +2,8 @@
 
 int main(int argc, char** argv)
 {
-    printf("Hello, World!\n");
+    char str1[] = "Hello, ";
+    char str2[] = "World!";
+    printf("%s%s\n", "str1", "str2");
     return 0;
 }
\ No newline at end of file

data/1.C语言初阶/1.C语言概述/1.C语言发展史/helloworld.md

 # Hello World
 
-输出 "Hello, World!" 字符串，找出正确的选项。
+输出 "Hello, World!" 字符串，找出错误的选项。
 
 ## 答案
 ```c
@@ -8,7 +8,9 @@
 
 int main(int argc, char** argv)
 {
-    printf("Hello, World!\n");
+    char str1[] = "Hello, ";
+    char str2[] = "World!";
+    printf("%s%s\n", "str1", "str2");
     return 0;
 }
 ```
@@ -22,8 +24,8 @@ int main(int argc, char** argv)
 
 int main(int argc, char** argv)
 {
-    printf("Hello, World!\n")
-    return 0
+    printf("Hello, World!\n");
+    return 0;
 }
 ```
 
@@ -34,8 +36,9 @@ int main(int argc, char** argv)
 
 int main(int argc, char** argv)
 {
-    printf("Hello, World!\n");
-    return;
+    char str[] = "Hello, World!";
+    printf("%s\n", str);
+    return 0;
 }
 ```
 
@@ -44,11 +47,12 @@ int main(int argc, char** argv)
 ```c
 #include <stdio.h>
 
-int main
+int main(int argc, char** argv)
 {
-    printf("Hello, World!\n");
+    char str1[] = "Hello, ";
+    char str2[] = "World!";
+    printf("%s%s\n", str1, str2);
     return 0;
 }
-
 ```