solution.md

# 分类计数

#### 问题描述
输入一个字符串，请输出这个字符串包含多少个大写字母，多少个小写字母，多少个数字。

#### 输入格式
输入一行包含一个字符串。

#### 输出格式
输出三行，每行一个整数，分别表示大写字母、小写字母和数字的个数。

#### 样例输入 
```
1+a=Aab
```
#### 样例输出 
```
1 
3 
1
```
#### 评测用例规模与约定 
对于所有评测用例，字符串由可见字符组成，长度不超过 100。


## aop
### before
```cpp
#include <iostream>
using namespace std;
```
### after
```cpp

```

## 答案
```cpp
int main(int argc, char **argv)
{
    string str;
    cin >> str;
    int A = 0, a = 0, number = 0;
    int len = str.length();
    for (int i = 0; i < len; i++)
    {
        if (str[i] <= '9' && str[i] >= '0')
        {
            number++;
        }
        if (str[i] <= 'Z' && str[i] >= 'A')
        {
            A++;
        }
        if (str[i] <= 'z' && str[i] >= 'a')
        {
            a++;
        }
    }
    cout << A << endl;
    cout << a << endl;
    cout << number << endl;
    return 0;
}

```
## 选项

### A
```cpp
int main(int argc, char **argv)
{
    string str;
    cin >> str;
    int A = 0, a = 0, number = 0;
    int len = str.length();
    for (int i = 0; i < len; i++)
    {
        if (str[i] < '9' && str[i] > '0')
        {
            number++;
        }
        if (str[i] < 'Z' && str[i] > 'A')
        {
            A++;
        }
        if (str[i] < 'z' && str[i] > 'a')
        {
            a++;
        }
    }
    cout << A << endl;
    cout << a << endl;
    cout << number << endl;
    return 0;
}
```

### B
```cpp
int main(int argc, char **argv)
{
    string str;
    cin >> str;
    int A = 0, a = 0, number = 0;
    int len = str.length();
    for (int i = 0; i < len; i++)
    {
        if (str[i] < 71 && str[i] > 60)
        {
            number++;
        }
        if (str[i] < 132 && str[i] > 101)
        {
            A++;
        }
        if (str[i] < 172 && str[i] > 141)
        {
            a++;
        }
    }
    cout << A << endl;
    cout << a << endl;
    cout << number << endl;
    return 0;
}
```

### C
```cpp
int main(int argc, char **argv)
{
    string str;
    cin >> str;
    int A = 0, a = 0, number = 0;
    int len = str.length();
    for (int i = 0; i < len; i++)
    {
        if (str[i] < 39 && str[i] > 30)
        {
            number++;
        }
        if (str[i] < 132 && str[i] > 101)
        {
            A++;
        }
        if (str[i] <= 'z' && str[i] >= 'a')
        {
            a++;
        }
    }
    cout << A << endl;
    cout << a << endl;
    cout << number << endl;
    return 0;
}
```