题解 | #统计字符#

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

#define MAX 1002

int main(){

    char arr[MAX];
    int c, k, n, o;
    n = k = c = o = 0;
    fgets(arr, sizeof(arr), stdin);
    arr[strlen(arr) - 1] = '\0';
    int len = strlen(arr);

    for(int i = 0; i < len; i++){
        if(arr[i] >= 'a' && arr[i] <= 'z')
            c++;
        else if(arr[i] >= 'A' && arr[i] <= 'Z')
            c++;
        else if(arr[i] >= '0' && arr[i] <= '9')
            n++;
        else if(arr[i] == ' ')
            k++;
        else
            o++;
    }

    printf("%d\n%d\n%d\n%d\n", c, k, n, o);
    return 0;
}