Passing int by value : function parameters « Function « C++ Tutorial

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C++ Tutorial » Function » function parameters

7.3.1.Passing int by value

#include <iostream>

 

 void swap(int x, int y);

 

 int main()

 {

     int x = 5, y = 10;

     std::cout << "Main. Before swap, x: " << x << " y: " << y << "\n";

     swap(x,y);

     std::cout << "Main. After swap, x: " << x << " y: " << y << "\n";

     return 0;

 }

 

 void swap (int x, int y)

 {

     int temp;

     std::cout << "Swap. Before swap, x: " << x << " y: " << y << "\n";

     temp = x;

     x = y;

     y = temp;

     std::cout << "Swap. After swap, x: " << x << " y: " << y << "\n";

 }

Main. Before swap, x: 5 y: 10
Swap. Before swap, x: 5 y: 10
Swap. After swap, x: 10 y: 5
Main. After swap, x: 5 y: 10

7.3.function parameters
	7.3.1.	Passing int by value
	7.3.2.	Define function to accept three int parameters
	7.3.3.	Pass a pointer to a function.
	7.3.4.	Pass variable address to a function
	7.3.5.	Pass int array to a function
	7.3.6.	Declare int array parameter for a function without indicating the array length
	7.3.7.	Function parameter: Use int pointer to accept an array
	7.3.8.	Use array as function's parameter
	7.3.9.	Change the contents of an array using a function
	7.3.10.	Pass a string to a function: Invert the case of the letters within a string
	7.3.11.	Change a call-by-value parameter does not affect the argument
	7.3.12.	Demonstrate the pointer version of swap(): Exchange the values of the variables pointed to by x and y
	7.3.13.	Using reference parameters
	7.3.14.	Passing a two-dimensional array to a function
	7.3.15.	Passing an array to a function
	7.3.16.	var args has to be the last one
	7.3.17.	the use of ... and its support macros va_arg, va_start, and va_end
	7.3.18.	Handling an array parameter as a pointer

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