PAT甲级1001. A+B Format (20)

时间限制400 ms
内存限制65536 kB
代码长度限制16000 B
判题程序Standard作者CHEN, Yue
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).InputEach 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.OutputFor 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

-999,991

#include<stdio.h>
int main()
{
int  a,b,c;
scanf("%d%d",&a,&b);
c=a+b;
if(c>=1000000||c<=-1000000)
{
if(c>=0) printf("%d,%03d,%03d",c/1000000,(c%1000000)/1000,c%1000);
else printf("%d,%03d,%03d",c/1000000,-(c%1000000)/1000,-c%1000);
}
else if(c>=1000||c<=-1000){
if(c>=0) printf("%d,%03d",c/1000,c%1000);
else printf("%d,%03d",c/1000,-c%1000);
}
else
{
if(c>=0) printf("%d",c);
else printf("%d",c);
}
return 0;
}