几个简单的C语言题目 谢谢大家解答下

给，都写完了，并且所有程序都已经编译运行确认了：
1.
#include
#include

void main()
{
int a,b;

printf("请输入两个数(输入方式: 数1 数2(回车))\n");
scanf("%d %d",&a,&b);

printf("%d + %d = %d\n",a,b,a+b);
printf("%d - %d = %d\n",a,b,a-b);
printf("%d * %d = %d\n",a,b,a*b);
printf("%d / %d = %d\n",a,b,a/b);
printf("%d %% %d = %d\n",a,b,a%b);

getch();
}

2.
#include
#include

#define pi 3.14159

void main()
{
float r;

printf("请输入圆半径: \n");
scanf("%f",&r);

printf("圆的直径 = %f\n",2*r);
printf("圆的周长 = %f\n",pi*2*r);
printf("圆的面积 = %f\n",pi*r*r);

getch();
}

3.
#include
#include
#include

#define pi 3.14159

void main()
{
float x,y;

printf("请输入的二个实数(输入格式: 数1 数2(回车)): \n");
scanf("%f %f",&x,&y);

printf("sinx = %f\n",sin(x));
printf("cosx = %f\n",cos(x));
printf("|x| = %f\n",fabs(x));
printf("ex = %f\n",exp(x));
printf("x^y = %f\n",pow(x,y));
getch();
}

4.
#include
#include

void main()
{
float f,c;

printf("输入华氏温度: ");
scanf("%f",&f);

c=5.0/9*(f-32);

printf("对应的摄氏温度为: %f\n",c);
getch();
}

第一题：
#include
int main()
{
int a,b;
printf("Input two numbers:\nNumber[1]=");
scanf("%d",&a);
printf("Number[2]=");
scanf("%d",&b);

printf("The numbers you input is %d and %d\n",a,b);
printf("%d + %d = %d \n%d * %d = %d \n%d %% %d = %d \n%d / %d = %d\n",
a, b, a+b, a, b, a*b, a, b, a%b, a, b , a/b);

return 0;
}

VC编译通过。
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第二题：
#include
#define PI 3.1415926

int main()
{
float mianji,zhouchang,banjing;/*懒得写英语，顺手打的拼音，凑合着看吧*/
printf("Input banjing:\nbanjing=");
scanf("%f",&banjing);

printf("yuan de banjing is %-6.2f \n",banjing);
zhouchang = banjing * PI * 2.0;
mianji = banjing * banjing * PI;
printf("yuan de zhouchang is %-6.2f\nmianji is %-6.2f\n",zhouchang,mianji);

return 0;
}
VC编译通过
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太懒了，知道怎么写都不去写