3. 编写程序数一下 1到 100 的所有整数中出现多少次数字9

#include<stdio.h>
int counts9(int n) {
int i, count = 0;
for (i = 1; i < 90; i++) {
if (i % 10 == 9) {
count++;
}
}
for (i = 90; i <= 100; i++) {
if (i % 10 == 0) {
count++;
}
}
return count;
}

int main() {
printf(“9有%d个\n”, counts9(100));
return 0;
}

标签：count,10,return,编写程序,int,counts9,++,数一下,100
来源： https://blog.csdn.net/weixin_45295598/article/details/93503172