Call by Reference Function in C

In call by reference, the address of the variable is passed into the function call as the actual parameter.

The value of the actual parameters can be modified by changing the formal parameters since the address of the actual parameters is passed.

In call by reference, the memory allocation is similar for both formal parameters and actual parameters. All the operations in the function are performed on the value stored at the address of the actual parameters, and the modified value gets stored at the same address.

Source Code

//Call by Reference Function in C Programming
void swap(int *x,int *y)
   int temp;
int main()
    int a,b;
    printf("\nEnter The Value of A & B : ");
    printf("\nBefore Swap  A : %d   | B : %d",a,b);
    printf("\nAfter  Swap  A : %d   | B : %d",a,b);
    return 0;
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