题解 | 包含数字9的数
包含数字9的数
https://www.nowcoder.com/practice/0948f4f3344c452f843afd3585dd0f8d
#include <stdio.h>
int main() {
int num = 0;
int count = 0;
for (int i = 1; i <= 2019; i++) {
num = i;
while (num) {
if (num % 10 == 9) {//取个位数字
count++;
break;//只需找到一次9就可以跳出
}
num /= 10;
}
}
printf("%d", count);
return 0;
}
