如題，自己看

#include <iostream>

#include <cstdlib>

using namespace std;

class Printf{

private:

int integer;

float float_number;

double double_number;

public:

float getfloat(float float_number)

{

float_number=1.111111111f;

}

double getfloat(double double_number)

{

double_number=1.111111111;

}

int getinteger(int integer)

{

integer = 100;

}

void print(void)

{

cout<<"hello, world"<<endl;

}

};

int main()

{

Printf p1;

p1.print();

}