1.打印100~200 之间的素数:
#include<stdio.h>
#include<stdlib.h>
int main()
{
int n = 100;
int i = 2;
for (n = 100; n <= 200; n++){
int flag = 0;
for (i = 2; i < n; i++){
if (n%i == 0){
flag = 1;
break;//break.结束本次循环
}
}
if (flag == 0)
printf("%d\n", n);
}
system("pause");
return 0;
}
2.输出乘法口诀表
#include<stdio.h>
#include<stdlib.h>
int main(){
int x = 1;
int y = 1;
for (x = 1; x <= 9; x++){
for (y = 1; y <= x; y++){
printf("%d*%d=%d", x,y,x*y);
if (x != y)
printf("\t");
//控制间隔
if (x == y)
printf("\n");
//让乘法表变行
}
}
system("pause");
return 0;
}
3.判断1000年—2000年之间的闰年
#include<stdio.h>
#include<stdlib.h>
//输出1000-2000之间的闰年
int main(){
int year = 1000;
for (year = 1000; year <= 2000; year++){
if (year % 4 == 0 && year % 100 != 0){
printf("%d\t", year);
}
}
system("pause");
return 0;
}