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 −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
C
#include<stdio.h>
int main() {
int a,b,sum,m;
scanf("%d %d",&a,&b);
sum=a+b;
if(sum<0)
m=-sum;
else
m=sum;
if(m>=1000||m<=-1000) {
if(m>=1000000||m<=-1000000) {
printf("%d",sum/1000000);
printf(",");
if((m/1000)%1000>=100)
printf("%d",(m/1000)%1000);
else if((m/1000)%1000>=10)
printf("0%d",(m/1000)%1000);
else if((m/1000)%1000>=0)
printf("00%d",(m/1000)%1000);
printf(",");
} else {
printf("%d",sum/1000);
printf(",");
}
if(m%1000>=100)
printf("%d",m%1000);
else if(m%1000>=10)
printf("0%d",m%1000);
else if(m%1000>=0)
printf("00%d",m%1000);
} else {
printf("%d",sum);
}
return 0;
}