1.打印乘法口诀表
#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<stdlib.h>
int main()
{
int i = 0;
int j = 0;
for (i = 1; i < 10; ++i)
{
for (j = 1; j <= i; ++j)
{
printf("%d*%d=%d ", i, j, i*j);
}
printf("\n");
}
system("pause");
return 0;
}
2.判断闰年
#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<stdlib.h>
int main()
{
int year = 0;
int flag = 1;
while (flag)
{
printf("请输入年份:");
scanf("%d", &year);
if (year < 0)
{
printf("输入错误,请重新输入:");
continue;
}
else
{
if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0))
{
printf("\n%d年是闰年。\n", year);
}
else printf("\n%d年不是闰年。\n", year);
}
printf("\n是否继续输入(1.是 0.否):");
scanf("%d", &flag);
}
system("pause");
return 0;
}