[PAT甲级]1001|[PAT甲级]1001 A+B Format （20 分)
题目
1001 A+B Format （20 分
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 ?10?6??≤a,b≤10?6??. 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
分析
【[PAT甲级]1001|[PAT甲级]1001 A+B Format （20 分)】水题，转换成字符串输出，考虑临界值为0的情况即可！
代码
#include#include#includeusing namespace std;
int main(){int a,b;
cin>>a>>b;
int x=a+b;
if(x==0){cout<<0<0) {str = char(x%10+'0') + str ;
if(i%3==0 && x>=10)str = ',' + str ;
x=x/10;
i++;
}if(flag==1) str='-'+str;
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