c ++查找字符串_C ++类和对象| 查找输出程序| 套装1

c ++查找字符串

Program 1:

程序1：

#include <iostream>
using namespace std;
class Sample {
private
int A;
private
int B;
public
void init()
{
A = 10;
B = 20;
}
public
void print()
{
cout << A << " " << B;
}
};
int main()
{
Sample S;
S.init();
S.print();
return 0;
}

Output:

输出：

main.cpp:6:5: error: expected ‘:’ before ‘int’
int A;
^~~
main.cpp:8:5: error: expected ‘:’ before ‘int’
int B;
^~~
main.cpp:11:5: error: expected ‘:’ before ‘void’
void init()
^~~~
main.cpp:17:5: error: expected ‘:’ before ‘void’
void print()
^~~~

Explanation:

说明：

The above code will generate errors because in the above program we did not use private and public modifiers properly.

上面的代码将产生错误，因为在上面的程序中我们没有正确使用private和public修饰符。

In C++, we need to use the colon ":" operator to specify modifiers block. Here we did not use modifiers for each member individually, here we create blocks like,

在C ++中，我们需要使用冒号“ ：”运算符来指定修饰符块。在这里，我们没有为每个成员单独使用修饰符，在这里，我们创建如下块：

class ABC {
private:
int A;
int B;
public:
void fun();
};

Here A and B are private members and fun() is public in ABC class.

这里A和B是私有成员，而fun()在ABC类中是公共的。

Program 2:

程式2：

#include <iostream>
using namespace std;
class Sample {
private:
int A;
int B;
public:
private:
public:
void init()
{
A = 10;
B = 20;
}
void print()
{
cout << A << " " << B;
}
};
int main()
{
Sample S;
S.init();
S.print();
return 0;
}

Output:

输出：

10 20

Explanation:

说明：

In the above program, we created a class Sample. Here we created two private members A and B. After that we used modifiers multiple times, In C++, last used modifiers decide the visibility of members so init() and print() function will be public type.

在上面的程序中，我们创建了Sample类。在这里，我们创建了两个私人成员A和B。之后，我们多次使用修饰符，在C ++中，最后使用的修饰符决定成员的可见性，因此init()和print()函数将成为公共类型。

Now, come to main() function, here we created of the object of Sample class and call init() and print() function then the "10 20" will be printed on the console screen.

现在，进入main()函数，在这里我们创建Sample类的对象，并调用init()和print()函数，然后“ 10 20”将被打印在控制台屏幕上。

Program 3:

程式3：

#include <iostream>
using namespace std;
class Sample {
int A = 10;
int B = 20;
public:
void print()
{
cout << A << " " << B;
}
};
int main()
{
Sample S;
S.print();
return 0;
}

Output:

输出：

10 20

Explanation:

说明：

In the above program, we created a Sample class that contains two data member A and B, they initialized with 10 and 20 respectively. Here we initial member at the time of declaration. It is also possible in C++.

在上面的程序中，我们创建了一个Sample类，其中包含两个数据成员A和B ，它们分别用10和20初始化。在这里，我们是宣布时的初始成员。在C ++中也是可能的。

Here we did not mention any access modifier. In C++, if we did not any specify any modifier then by default it will be considered as a private type.

这里我们没有提及任何访问修饰符。在C ++中，如果我们未指定任何修饰符，则默认情况下它将被视为私有类型。

In the main() function, we create object S of Sample class and then call print() member function of Sample class, which will print "10 20" on the console screen.

在main()函数，我们创建Sample类的对象S，然后呼叫打印() 成员函数 Sample类的，其将打印“10 20”在控制台屏幕上。