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).
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 9Sample Output
-999,991
直接上代码:
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
void print1(int sum){
if(sum/-1000 >= 1){
print1(-(sum-sum%1000)/-1000);
int r = (int)fabs(sum%(-1000));
if(r!=0) {
if(r< 10){
printf(",00%d",-(sum%-1000));
}else if(r < 100){
printf(",0%d",-(sum%-1000));
}else{
printf(",%d",-(sum%-1000));
}
}
else printf(",000");
}else{
printf("%d",sum);
}
}
void print2(int sum){
if(sum/1000 >= 1){
print2((sum-sum%1000)/1000);
int r = sum%1000 ;
if(r!=0){
if(r < 10){
printf(",00%d",sum%-1000);
}else if(r < 100){
printf(",0%d",sum%-1000);
}else{
printf(",%d",sum%-1000);
}
}
else printf(",000");
}else{
printf("%d",sum);
}
}
int main(){
int a , b ,sum;
scanf("%d %d",&a,&b);
sum = a+b;
if(sum < 0) print1(sum);
else print2(sum);
return 0 ;
}
本文介绍了一种使用C语言解决A+B问题的方法,并通过递归函数实现了千位分隔符的功能。输入为两个整数,输出则为带有逗号分隔的计算结果。
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