题解 | #添加逗号#
添加逗号
http://www.nowcoder.com/practice/f51c317e745649c0900996fd3f683aed
#include<string.h>
int main() {
char s[20] = {0};
scanf("%s", &s);
int val = strlen(s); //获取字符长度
for (int i = 1; i <= val; i++) { //依次输出字符
printf("%c", s[i - 1]);
//每输出三位数加一个‘，’且输出数不为最后一个数
if ((val - i) % 3 == 0 && i != val) printf(",");
}
return 0;
}
