题解 | #统计字符#

#include <stdio.h>
#include <string.h>

int main() {
    char a[1001]= {0};
    int i,len;
    int cnt[4] = {0};

    fgets(a, 1000, stdin);

    len = strlen(a);
    for (i = 0; i < len; i++) {
        if (((a[i] >= 'A') && (a[i] <= 'Z')) || ((a[i] >= 'a') && (a[i] <= 'z'))) {
            cnt[0]++;
        }else if(a[i] == ' ') {
            cnt[1]++;
        } else if ((a[i] >= '0') && (a[i] <= '9')){
            cnt[2]++;
        }  else {
            /* fgets 会把换行符存下来 */
            if (a[i] != '\n') {
                cnt[3]++;
            } 
        }
    }

    for (i = 0; i < 4; i++) {
        printf("%d\n",cnt[i]);
    }

    return 0;
}