[C++知识库]C++ 10.27

1、

#include<iostream>
using namespace std;
int main()
{
?? ?char ch = 's';
?? ?cout << ch << endl;
?? ?cout << "char所占的内存空间为" << sizeof(char) << endl;
?? ?cout << (int)ch << endl;
?? ?system("pause");
?? ?return 0;
}

2、

#include<iostream>
using namespace std;
int main()
{
?? ?cout << "hello world\n";
?? ?system("pause");
?? ?return 0;
}

#include<iostream>
using namespace std;
int main()
{
?? ?cout << "\\"<<endl;
?? ?system("pause");
?? ?return 0;
}

#include<iostream>
using namespace std;
int main()
{
?? ?cout << "ss\tuuu"<<endl;
?? ?cout << "s\tuuu" << endl;
?? ?cout << "ssssss\tuuu" << endl;
?? ?cout << "sssssss\tuuu" << endl;
?? ?system("pause");
?? ?return 0;
}

3、

#include<iostream>
using namespace std;
int main()
{
?? ?char str[] = "qwer";
?? ?cout << str << endl;
?? ?system("pause");
?? ?return 0;
}

#include<iostream>
using namespace std;
#include<string>
int main()
{
?? ?string str = "qwer";
?? ?cout << str << endl;
?? ?system("pause");
?? ?return 0;
}

4、

#include<iostream>
using namespace std;
int main()
{
?? ?bool flag = true;
?? ?cout << flag << endl;
?? ?cout << "bool所占用的内存空间为：" << sizeof(bool) << endl;
?? ?system("pause");
?? ?return 0;
}

5、

#include<iostream>
using namespace std;
int main()
{
?? ?int a = 0;
?? ?cout << "请输入整型a的值：" << endl;
?? ?cin >> a;
?? ?cout << "整型a的值：" <<a<< endl;
?? ?system("pause");
?? ?return 0;
}

#include<iostream>
using namespace std;
int main()
{
?? ?float f = 0;
?? ?cout << "请输入浮点型f的值：" << endl;
?? ?cin >> f;
?? ?cout << "浮点型f的值：" <<f<< endl;
?? ?system("pause");
?? ?return 0;
}

#include<iostream>
using namespace std;
int main()
{
?? ?char ch = '0';
?? ?cout << "请输入字符型ch的值：" << endl;
?? ?cin >> ch;
?? ?cout << "字符型ch的值：" <<ch<< endl;
?? ?system("pause");
?? ?return 0;
}

#include<iostream>
using namespace std;
#include<string>
int main()
{
?? ?string str = "0";
?? ?cout << "请输入字符串型str的值：" << endl;
?? ?cin >> str;
?? ?cout << "字符串型str的值：" <<str<< endl;
?? ?system("pause");
?? ?return 0;
}

#include<iostream>
using namespace std;
int main()
{
?? ?bool flag = true;
?? ?cout << "请输入布尔型flag的值：" << endl;
?? ?cin >> flag;
?? ?cout << "布尔型flag的值：" <<flag<< endl;
?? ?system("pause");
?? ?return 0;
}