1023.c

用于学习的C原程序

#include <stdio.h>
int main()
{
    char a;
    int letters,numbers,space,others;
    while(scanf("%c",&a),a!='\n')
    {
        //scanf("%c",&a);
        if(a=='\n')
            break;
        else if((a>='A' && a<='Z')||(a>='a' && a<='z'))
        {
            letters++;
        }
        else if(a>='0' && a<='9')
        {
            numbers++;
        }
        else if(a==' ')
        {
            space++;
        }
        else
        {
            others++;
        }
    }
    printf("letters=%d\n",letters);
    printf("numbers=%d\n",numbers);
    printf("space=%d\n",space);
    printf("others=%d\n",others);
    return 0;
}