代码资料:
#include "stdio.h"
int main(int argc,char *argv[]){
int n,m;
printf("Enter n(int 0<=n<=999)...\nn=");
if(scanf("%d",&n)!=1 || n<0 || n>999){
printf("Input error, exit...\n");
return 0;
}
printf("%d --> ",n);
for(m=0;n>0;m+=n%10,n/=10);
printf("The result is %d\n",m);
return 0;
}