题解 | 求四位数各个数位之和

#include <stdio.h>

int main() {
    char arr[5];
   
    scanf("%s",&arr);
    
    int count = 0;
    count=(arr[0]-'0')+(arr[1]-'0')+(arr[2]-'0')+(arr[3]-'0');
    printf("%d",count);
    return 0;
}