题目
Calculate a+b and output the sum in standard format – that is, the digits must be separated into groups of three by commas (unless there are less than four digits).
Input Specification:
Each input file contains one test case. Each case contains a pair of integers a and b where −106 ≤a,b≤106 . The numbers are separated by a space.
Output Specification:
For each test case, you should output the sum of a and b in one line. The sum must be written in the standard format.
Sample Input:
-1000000 9
Sample Output:
-999,991
Code:
#include<iostream>
#include<math.h>
using namespace std;
int main(){
int a,b,count=0;
scanf("%d %d",&a,&b);
int sum=a+b;
char result[20];
if(sum==0) cout<<"0";
else{
if(sum<0){
cout<<"-";
sum=(-1)*sum;
}
int i=1;
while(sum>0){
result[i]=(sum%10)+'0';
sum/=10;
i++;
if(i%4==0&&sum!=0){
result[i]=',';
i++;
}
}
for(int j=(i-1);j>=1;j--)
cout<<result[j];
}
return 0;
}