[PAT] 1001A+B Format (20)

题意是求给出两个数的和,按三位一个逗号的格式输出

//已AC代码#include<bits/stdc++.h>using namespace std;int main(){    int a,b;    while(~scanf("%d%d",&a,&b))    {        int sum;        sum=a+b;        if(sum<0)        {            printf("-");            sum=-sum;        }        if(sum>=1000000)        {            printf("%d,%03d,%03d\n",sum/1000000,(sum/1000)%1000,sum%1000);        }        else if(sum>=1000)        {            printf("%d,%03d\n",(sum/1000)%1000,sum%1000);        }        else        {            printf("%d\n",sum);        }    }}