求任意一个数字的各位数字之和

//核心思想：边分解边累加#include<stdio.h>int hezhi(int n);int hezhi(int n){    int sum = 0;    while(n)    {        sum += n%10;        n = n/10;    }    return (sum);}int main(void){    int n;    printf("请输入一个正整数\n");    scanf("%d",&n);    printf("此数的各位数字之和为%d\n",hezhi(n));}