计算一个三位数的各位之和

#include <stdio.h>#include <stdlib.h>int main(void){    int a,b,c,x,sum;    scanf("%d",&x);    a=x/100;    b=(x-c*100)/10;    c=x%10;    sum=a+b+c;    printf("a=%d,b=%d,c=%d,sum=%d\n",a,b,c,sum);    return 0;}