1001. A+B Format (20)

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本文介绍了一种方法，用于将两个整数相加，并按照标准格式输出结果，即每三位数字之间用逗号隔开。

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

Each input file contains one test case. Each case contains a pair of integers a and b where -1000000 <= a, b <= 1000000. The numbers are separated by a space.

Output

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

#include<iostream>
#include<vector>
#include<stack>

using namespace std;
int  main(){
	stack<char> v;
	int a,b;
	cin>>a>>b;
	int c=a+b;
	int sign=0;
	if(c==0){
		cout<<"0"<<endl;
		return 0;
	}
	if(c<0){
		sign=1;
		c=0-c;
	}
	int count=0;
	int flag=0;
	while(c>0){
		int temp=c%10;
		count++;
		v.push(temp+48);
		if(count%3==0 && count>0){
			flag++;
		    v.push(44);
		}
		c=c/10;
	}
	if((v.size()-flag)%3==0)
		v.pop();
	if(sign==1){
		cout<<'-';
	}
	while(!v.empty()){	
		cout<<v.top();
		v.pop();		
	}
	system("pause");
	return 0;
}