2021_2_1

if語句

判斷輸入是不是奇數
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>

int main()
{
int a = 0;
scanf("%d", &a);
if (1 == a % 2)
printf("奇數\n");
else
printf("非奇數\n");
return 0;

}

輸出0—100奇數
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>

int main()
{
int a = 1;
while (a <= 100)
{

if (1 == a % 2)
        printf("%d ",a);
    a++;

}
return 0;

}

swich語句

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>

int main()
{
int day = 0;
scanf("%d", &day);
switch (day)
{
case 1:
printf("星期1\n");
break;
case 2:
printf("星期2\n");
break;
case 3:
printf("星期3\n");
break;
case 4:
printf("星期4\n");
break;
case 5:
printf("星期5\n");
break;
case 6:
printf("星期6\n");
break;
case 7:
printf("星期7\n");
break;
default:
printf("輸入錯誤\n");
}

}