技術標籤：c++學習c++

/*
	Description: do while語句
		保證迴圈體至少執行一次
	注意：
		1.要在do語句之前定義變數
		2.不可以在迴圈條件裡定義變數 
*/
#include<iostream>
using namespace std;

int main()
{
	int i;
	i = 0;
	while(i<10)
	{
		cout<<i<<" ";
		++i;
	}
	cout<<endl;
	
	int j;
	j = 0;
	do
	{
		cout<<
 
"j:"<<j<<endl;
		++j;	
	}while(j<10);
	
	string rep;
	do{
		cout<<"please enter two valuse:"<<endl;
		int val1,val2;
		cin>>val1>>val2;
		cout<<"the sum of "<<val1<<" and "<<val2<<" = "
 
<<val1+val2<<"\n\n"
			<<"more?[yes][no]"<<endl;
		cin>>rep;
	}while(!rep.empty()&&rep[0]!='n');
	
//	while(int foo = get_foo())
//	{
//		
//	}
//	
//	do{
//		不可以的 
//	}while(int foo = get_foo());

	string str1,str2,str3;
	do{
		cout<<"enter two strings:"
 
<<endl;
		cin>>str1>>str2;
		if(str1 < str2)
			cout<<"the first string is smaller than the second string"<<endl;
		else if(str1 == str2)
			cout<<"the strings are equal"<<endl;
		else
			cout<<"the second string is smaller than the first string"<<endl;
		
		cout<<"continue?(y-yes,n-no)"<<endl;
		cin>>str3; 
	} while(str3[0] != 'n' && str3[0] != 'N');
	
	return 0;
}