#include "stdio.h"
int main(int argc,char *argv[]){
int n,s,t;
printf("Please enter n(int 999<n<10000)...\nn=");
if(scanf("%d",&n)!=1 || n<1000 || n>9999){
printf("Input error, exit...\n");
return 0;
}
for(s=0;n;n/=10){
printf("%d ",t=n%10);
s+=t;
}
printf("\nThe sum of them is %d\n",s);
return 0;
}
运行样例:
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/f703738da9773912ba704268f5198618367ae261?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)