c代码记录之字符串分类统计

解题思路:

注意事项:

1. scanf遇到空格停止读取输入，所以使用gets

2. 遍历到\0停止，因为字符串结尾默认\0

参考代码:

#include<stdio.h>
int main()
{
    char zifu[201];
    int i,sum_zimu=0,sum_number=0,sum_space=0,sum_other=0;
    gets(zifu);
    for(i=0;zifu[i]!='\0';i++)
    {
        if(('A'<=zifu[i]&&zifu[i]<='Z')||('a'<=zifu[i]&&zifu[i]<='z'))
            sum_zimu+=1;
        else if('0'<=zifu[i]&&zifu[i]<='9')
            sum_number+=1;
        else if(zifu[i]==' ')
            sum_space+=1;
        else
            sum_other+=1;
    }
    printf("%d %d %d %d",sum_zimu,sum_number,sum_space,sum_other);
    return 0;
}