[C++面向对象程序设计]第一章 C++的初步知识

4.

#include<iostream>
using namespace std;
int main()
{
	int a,b,c;
	a=b=c=0;
	cin>>a>>b;
	c=a+b;
	cout<<"a+b="<<c<<endl;
	return 0;
}

5.

#include<iostream>
using namespace std;
int main()
{
	int add(int x,int y) ;
	int a=0;
	int b=0;
	int c=0;
	cin>>a>>b;
	c=add(a,b);
	cout<<"a+b="<<c<<endl;
	return 0;
}
int add(int x,int y)
{
	int z=0;
	z=x+y;
	return (z);
}

6.

using namespace std;
int main()
{
	void sort(int x,int y,int z);
	int x,y,z;
	x=y=z=0;
	cin>>x>>y>>z;
	sort(x,y,z);
	return 0;
}
void sort(int x,int y,int z)
{
	int temp=0;
	if(x>y) {temp=x;x=y;y=temp;}
	if(z<x) cout<<z<<','<<x<<','<<y<<endl;
	else if(z<y) cout<<x<<','<<z<<','<<y<<endl;
	else cout<<x<<','<<y<<','<<z<<endl;
}

7.

#include<iostream>
using namespace std;
int main()
{
	void max(int x=2,int y=3);
	int a,b;
	a=b=0;
	max();
	return 0;
}
void max(int x,int y)
{
	if(x>y) 
		cout<<x<<endl;
	else cout<<y<<endl;
}

8.

#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
	void sort(int &x,int &y);
	int a,b;
	a=b=0;
	cin>>a>>b;
	sort(a,b);
	return 0;
}
void sort(int &x,int &y)
{
	if(x>=y)
		cout<<x<<setw(3)<<y<<endl;
	else cout<<y<<setw(3)<<x<<endl;
}

9.

#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
	void sort(int &x,int &y,int &z);
	int a,b,c;
	a=b=c=0;
	cin>>a>>b>>c;
	sort(a,b,c);
	return 0;
}
void sort(int &x,int &y,int &z)
{
	int temp=0;
	if(x>y)
	{temp=x;x=y;y=temp;}
	if(z<x) cout<<z<<','<<x<<','<<y<<endl;
	else if(z<y) cout<<x<<','<<z<<','<<y<<endl;
	else cout<<x<<','<<y<<','<<z<<endl;
}

10.

#include<iostream>
#include<string>
using namespace std;
int main()
{
	string str1="i ";
	string str2="love";
	str1=str1+str2;
	cout<<str1<<endl;
	return 0;
}

11.

#include<iostream>
#include<string>
using namespace std;
int main()
{
	int n=0;
	string str1="i ";
	cin>>str1;
	n=str1.size();
	for(int i=0;i<n/2;i++)
	{
		char temp=str1[i];
		str1[i]=str1[n-i-1];
		str1[n-i-1]=temp;
	}
	cout<<str1<<endl;
	return 0;
}
12.
#include<iostream>
#include<string>
using namespace std;
int main()
{
	string str[5];
	for(int i=0;i<5;i++)
		cin>>str[i];
	for(i=0;i<4;i++)
		for(int j=i+1;j<5;j++)
		{
			if(str[i]>str[j])
			{
				string temp=str[i];
				str[i]=str[j];
				str[j]=temp;
			}
		}
	for(i=0;i<5;i++)
		cout<<str[i]<<endl;
	return 0;
}

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转载自blog.csdn.net/daisy_fight/article/details/80161623