1.
#include<stdio.h>
main()
{
int mark;
printf("请输入学生的分数(0-100):\n");
scanf("%d",&mark);
switch(mark/10)
{
case 10:
case 9:printf("A\n");break;
case 8:printf("B\n");break;
case 7:printf("C\n");break;
case 6:printf("D\n");break;
default:printf("NO PASS!\n");
}
}
2. #include<stdio.h>
main()
{
float x,y;
printf("请输入x的值:\n");
scanf("%f",&x);
if(x>0)
y=x*x+1;
else if(x==0)
y=0;
else
y=-x*x+1;
printf("{x=%f\ny=%f\n",x,y);
}
.,3
#include<stdio.h>
main()
{
float n1,n2;
char sign;
printf("请输入计算的表达式:\n");
scanf("%f%c%f",&n1,&sign,&n2);
switch(sign)
{
case'+':printf("n1+n2=%f\n",n1+n2);break;
case'-':printf("n1-n2=%f\n",n1-n2);break;
case'*':printf("n1*n2=%f\n",n1*n2);break;
case'/':printf("n1/n2=%f\n",n1/n2);break;
}
}
4.
#include<stdio.h>
int main()
{int year;
printf("请输入具体年份: ");
scanf("%d",&year);
if (year%400==0||year%4==0&&year%100!=0)
printf("%d是闰年\n",year);
else
printf("%d不是闰年\n",year);
return 0;
}
5.编写程序,使用条件运算符找出三个数中最小的数字,并输出.
#include<stdio.h>
main()
{
float a,b,c,min;
scanf("%f%f%f",&a,&b,&c);
min=a<b?a:b;
min=min<c?min:c;
printf("Min:%f\n",min);
}
6.编写程序,判断整数m是否能被4和6同时整除.
#include<stdio.h>
main()
{
int m;
scanf("%d",&m);
if(m%4==0 && m%6==0)
printf("Yes\n");
else
printf("No\n");
}
