C二级辅导-统计字符 （C语言代码）

解题思路:

注意事项:

参考代码:

#include<stdio.h>

int main()

{

    char a[100];

    int i=0,count1=0,count2=0,count3=0,count4=0;

    gets(a);

    while(a[i]!='\0')

    {

        if((a[i]>='a'&&a[i]<='z')||(a[i]>='A'&&a[i]<='Z'))

        {

            ++count1;

        }

        else if(a[i]==' ')

        {

            ++count2;

        }

        else if(a[i]>='0'&&a[i]<='9')

        {

            ++count3;

        }

        else

        {

            ++count4;

        }

        ++i;

    }

    printf("%d\n%d\n%d\n%d\n",count1,count2,count3,count4);

    return 0;

}