While calling a function, the arguments can be passed to a function in two ways, Call by value and call by reference.
| Type | Description |
|---|---|
| Call by Value |
|
| Call by Reference |
|
Call by Value
Example:
#include<stdio.h>
/* function declaration */int addition(int num1, int num2);
int main()
{
/* local variable definition */ int answer;
int num1 = 10;
int num2 = 5;
/* calling a function to get addition value */ answer = addition(num1,num2);
printf("The addition of two numbers is: %d\n",answer);
return 0;
}
/* function returning the addition of two numbers */int addition(int a,int b)
{
return a + b;
}Program Output:
The addition of two numbers is: 15
Call by Reference
Example:
#include<stdio.h>
/* function declaration */int addition(int *num1, int *num2);
int main()
{
/* local variable definition */ int answer;
int num1 = 10;
int num2 = 5;
/* calling a function to get addition value */ answer = addition(&num1,&num2);
printf("The addition of two numbers is: %d\n",answer);
return 0;
}
/* function returning the addition of two numbers */int addition(int *a,int *b)
{
return *a + *b;
}Program Output:
The addition of two numbers is: 15
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