题解 | #添加逗号#
添加逗号
https://www.nowcoder.com/practice/f51c317e745649c0900996fd3f683aed
#include<stdio.h>
#include<string.h>
int main()
{
char a[20];
scanf("%s",a);
int len=strlen(a),count=0;
char *p=a;
for( ;p<(a+len);p++)
{
if(len%3==0)
{
if((count)%3==0&&count!=0) printf(",");
count++;
printf("%c",*p);
}
else
{
int c=len%3;
if((count-c)%3==0) printf(",");
count++;
printf("%c",*p);
}
}
return 0;
}
