简单水题
#include<stdio.h>
#define NUM 15
int cnt[NUM];
int main()
{
int a,b,sum;
scanf("%d %d",&a,&b);
sum=a+b;
if(sum==0){
printf("0");
return 0;
}
if(sum<0){
printf("-");
sum=0-sum;
}
int index=1;
while(sum){
cnt[index++]=sum%10;
sum=sum/10;
}
for(int i=index-1;i>=1;i--){
if(i%3==0&&i!=index-1)
printf(",");
printf("%d",cnt[i]);
}
return 0;
}