第六章2

【题目描述】

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).

【输入】

Only one line. Contains two integers a and b(-1000000≤a, b≤1000000). The numbers are separated by a space.

【输出】

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int a,b,x,i,j=0;
    scanf("%d %d",&a,&b);
    x=a+b;
    if(x<0)
    {
        printf("-");
        x=-x;
    }
    int m[10];
    for(i=0;x>0;i++)
    {
        m[i]=x%10;
        x=x/10;
        j++;
    }
    for(i=j-1;i>=0;i--)
    {
        printf("%d",m[i]);
        if(i==9||i==6||i==3)
            printf(",");
    }
    return 0;
}

Only one line. Output the sum of a and b in one line. The sum must be written in the standard format.

【样例输入】

-1000000 9↙

【样例输出】

-999,991