Pass variable address to a function : function parameters « Function « C++ Tutorial






  1. C++ Tutorial
  2. Function
  3. function parameters
#include <iostream> 
using namespace std; 
 
void f(int *j); 
 
int main() 
{ 
  int i; 
 
  f(&i);  
 
  cout << i; 
 
  return 0; 
} 
    
void f(int *j) 
{ 
  *j = 100; // var pointed to by j is assigned 100 
}

100




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