题1

原创于 2014-03-23 11:04:17 发布 · 477 阅读

CC 4.0 BY-SA版权

本文详细介绍了C++编程的基础知识，并通过实例展示了如何使用C++进行基本操作，包括布尔值输出、变量赋值、字符转换、类型转换、自增自减运算符等。此外，还探讨了C++中的一些特殊特性，如前置和后置自增运算符的差异，字符到大写字母的转换，以及如何将非数字类型转换为整型。

#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
	bool flag=true;
	cout<<flag<<endl;
	cout<<boolalpha<<flag<<endl;
	cout<<flag+5<<endl;
	flag=0;
	cout<<"执行语句 flag=3；后flag的值为:"<<boolalpha<<flag<<endl;
	flag=0.0;
	cout<<"执行语句 flag=8; 后flag的值为:"<<boolalpha<<flag<<endl;
	return 0;
}

#include <iostream>
using namespace std;
int main()
{
	int i = 6,j,k,temp;
	j = ++i;
	k = i++;
	++i = 1;
	cout<<"i = "<<i<<endl
		<<"j = "<<j<<endl
		<<"k = "<<k<<endl;
	return 0;
}

#include <iostream>
using namespace std;
int main()
{
	char ch;
	cout<<"please input a character:";
	cin>>ch;
	ch = ch >= 'a' && ch <= 'z' ? ch - 'a' +'A' :ch;
	cout<<"The result is:"<<ch<<endl;
	return 0;
}

#include <iostream>
using namespace std;
int main()
{
	int ab,ac;
	double b = 3.14;
	char c = 'S';
	ab = int(b);
	ac = int(c);
	cout<<"b = "<<b<<endl;
	cout<<"ab = "<<ac<<endl;
	cout<<"c = "<<c<<endl;
	cout<<"ac = "<<ac<<endl;
	return 0;
}