C++ Primer Plus笔记: 2023.07.15

第五章编程题:
(8)

#include 
#include 
using namespace std ;

const int ArraySize = 20 ;

int main()
{
	char vocabulary[ArraySize] = {0} ;
	int i = 0 ;
	
	cout << "Enter words (to stop, type the word done) : \n" ;
	
	do
	{
		cin >> vocabulary ;
		i ++ ;
	} while (strcmp(vocabulary, "done")) ;

	i-- ;
	cout << "You entered a total of " << i << " words.\n" ;
}

(9)

#include 
#include 
using namespace std ;

int main()
{
	string vocabulary ;
	int i = 0 ;
	
	cout << "Enter words (to stop, type the word done) :\n" ;
	do
	{
		cin >> vocabulary ;
		i ++ ; 
	} while (vocabulary != "done") ;

	i --;
	cout << "You entered a total of " << i << " words.\n" ;
}

(10)

#include 
using namespace std ;

int main()
{
	int n ;
	cout << "Enter number of rows: " ;
	cin >> n ;
	
	for (int i=1; i<=n; i++)
	{
		for (int j=0; j<(n-i); j++) cout << "." ;
		for (int j=0; j<i; j++) cout << "*" ;
		cout << endl ;
	}
	return 0 ;
}

这里要注意，计算机的输入队列和输出队列是分开的。