第七章 循环语句 简单

/*
// 1 循环语句的老祖宗Goto语句
#include <iostream>
using namespace std;
int main()
{
     int i= 1;
	 if(i > 10){
	     //goto yes;
	 }
	 cout<<"*"<<i<<endl;
	 i++;
	 //goto yes;
	 cout<<"程序结束";
	 cout<<"********\n";
yes:;
	 return 0;
}
*/


/*
// 2 while语句
#include <iostream>
using namespace std;
int main()
{
    int i=1;
	while(i < 10)
	{
	    cout<<"i:"<<i<<endl;
		i++;
	}
	return 0;
}
*/


/*
// 3 while语句的其它用法
#include <iostream>
using namespace std;
int main()
{
	int number, dot=1;
	cout<<"请问你想看几次:"<<endl;
	cin>>number;
	while(dot <= number)
	{
	    cout<<"问君能有几多愁，恰似一江春水向东流"<<endl;
		dot++;
	}
	cout<<"程序运行结束"<<endl;
	

    return 0;
}

*/

/*
// 4 continue和break语句
#include <iostream>
using namespace std;
int main()
{
	int i=0;
	int b = 10;
	while(i < b )
	{
		i++;
		if(i == 8){
		    cout<<"这里进行跳出while循环"<<endl;
			break;
		}
		if(i==2){
		   cout<<"这里只是跳出本次循环2"<<endl;
		   continue;
		}
		
		cout<<"i的值为:"<<i<<endl;
	}
    return 0;
}
*/

/*
// 6 do...while循环
#include <iostream>
using namespace std;
int main()
{
	int number;
	cout<<"请问您要看几次:"<<endl;
	cin>>number;
	int dot=0;
	do{
		 cout<<"这是第"<<number<<"次循环"<<endl;
	     dot ++;
	}while(dot <  number);
    return 0;
}
*/

/*
//7 for循环
#include <iostream>
using namespace std;
int main()
{
	int number, dot=0;
	cout<<"请问您要看几次:"<<endl;
	cin>>number;
	for(int i=number; i>0; i--)
	{
	   cout<<"这是第"<<i<<"次操作"<<endl;
	}

    return 0;
}
*/

//8 灵活的for循环
#include <iostream>
using namespace std;
int main()
{
	for(int i=0, x=0,y=0; x<= 3; i++,x++,y++)
	{
	    cout<<"i="<<i<<", x="<<x<<", y="<<y<<endl;
	}
    return 0;
}