题解 | #统计字符#

#include <stdio.h>

int main()
{
    char str[1000];
    while(gets(str) != NULL)
    {
        int num1 = 0, num2 = 0, num3 = 0, num4 = 0;
        for(int i = 0; str[i] != 0; i++)
        {
            if((str[i] >= 'a' && str[i] <= 'z') || (str[i] >= 'A' && str[i] <= 'Z'))
            {
                num1++;
            }
            else if(str[i] == ' ')
            {
                num2++;
            }
            else if(str[i] >= '0' && str[i] <= '9')
            {
                num3++;
            }
            else
            {
                num4++;
            }
        }
        printf("%d\n%d\n%d\n%d\n", num1, num2, num3, num4);
    }
    return 0;
}