C_在switch
源码：
# include <stdlib.h>
# include <stdio.h>
int main()
{
int month;
int day;
printf("please input the month number: ");
scanf("%d", &month);
switch (month)
{
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12: day=31; // 有31天的月份情况
break;
case 4:
case 6:
case 9:
case 11: day=30; // 有30天的月份的情况
break;
case 2: day=28; // 非闰年的2月有28天
break;
default: exit(0);
}
printf("1999.%d has %d days.\n", month, day);
return 0;
}
其中，若能按输入年份分为闰年和非闰年输出每月天数，可能更好。（待解决）
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源码:
# include <stdio.h>
int main()
{
/* 定义了一个无符号字符型变量，此变量只能用来存储无符号数 */
unsigned char result;
int a, b, c, d;
a = 2;
b = 4; ......
源码:
# include <stdio.h>
int main()
{
/* 定义一个整形指针p */
int *p;
int begin, end;
begin = 10;
/* 给指针p赋初值 */
p = &begin;
& ......
源码:
# include <stdio.h>
int main()
{
int x, y, z, mid, dec;
printf("请任意输入三个整数：\n");
scanf("%d %d %d", &x, & ......
源码:
# include <stdio.h>
int main()
{
int i, j, k;
/* 变量i从0到4，表示所画菱形图的第一至第五行 */
for(i = 0; i <= 4; i++)
{
/* ......
