第七周作业1

#include "stdafx.h"
#include<iostream>
using namespace std;

void display()
{
cout<<"This is an example."<<endl;
}

int main()
{
display();

return 0;
}

#include "stdafx.h"
#include<iostream>
using namespace std;

float min(float x,float y)
{
return x<y?x:y;
}

int main()
{
cout<<min(6.0,5.0)<<endl;

return 0;
}

#include "stdafx.h"
#include<iostream>
using namespace std;

double circleArea(double);

int main()
{
double area=circleArea(5.0);
cout<<"area="<<area<<endl;
return 0;
}

double circleArea(double r)
{
double pi=3.14;
double area=pi*r*r;
return area;
}

#include "stdafx.h"
#include<iostream>
using namespace std;

int sum(int x,int y)
{
int temp;
temp=x+y;
return temp;
}

int main()
{
int a,b,c;
a=10;b=5;
c=sum(a,b);
cout<<a<<"+"<<b<<"="<<c<<endl;

return 0;
}

#include "stdafx.h"
#include<iostream>
using namespace std;

int ncomp=(int i,int j)
{
if(i>j) return 1;
if(i==j) return 0;
else -1;
}

int main()
{
int k=2;
int n=ncomp(k,k++);
cout<<n

return 0;
}

#include "stdafx.h"
#include<iostream>
#include<iomanip>
using namespace std;

int max(int u,int v)
{
int w;
w=u>v?u:v;
return w;
}

int main()
{
int a,b,c;
cout<<"please input two numbers:";
cin>>a>>b;
c=max(a,b);
cout<<"a="<<a<<"b="<<b<<endl;
cout<<"Max is"<<c<<endl;

return 0;
}

#include "stdafx.h"
#include<iostream>
#include<iomanip>
using namespace std;

int sqr(int x)
{
x=x*x;
return x;
}

int main()
{
int t=10;
int s=sqr(t);
cout<<"t="<<t<<'\t'
<<"sqr("<<t<<")="<<s<<endl;

return 0;
}

#include "stdafx.h"
#include<iostream>
#include<iomanip>
using namespace std;

void swap(int u,int v);

int main()
{
int a=3;
int b=4;
cout<<"a="<<a<<"\tb="<<b<<endl;
swap(a,b);
cout<<"a="<<a<<"\tb="<<b<<endl;

return 0;
}

void swap(int u,int v)
{
int temp;
temp=u;
u=v;
v=temp;
}

#include "stdafx.h"
#include<iostream>
#include<iomanip>
using namespace std;

void swap(int &u,int &v);

int main()
{
int a=3;
int b=4;
cout<<"a="<<a<<"\tb="<<b<<endl;
swap(a,b);
cout<<"a="<<a<<"\tb="<<b<<endl;

return 0;
}

void swap(int &u,int &v)
{
int temp=v;
v=u;
u=temp;
}

#include "stdafx.h"
#include<iostream>
#include<iomanip>
using namespace std;

void display(int x,float y)
{
cout<<x<<" "<<y;
return;
}

int main()
{
float a;
int b;
cin>>b>>a;
display(b,a);

return 0;
}