Differentiate between call by value and call by reference in c?

[cronus consultants]

Differentiate between call by value and call by reference in c?

[ankitasharma123]

You can get a Good information about call by reference and call by value...http://www.codingunit.com/c-tutorial...l-by-reference

[zinist]

Hi,
Call By Value: - In call by the value we are passing a copy of the actual value to the function, and original value does not get affected.
Call By Reference: - In this function we are passing an actual value to a function and the operation are performed on the actual value.

[eastman]

pass-by-value: we are passing a copy of the variable to a function.
pass-by-reference: we are passing an alias of the variable to a function.

C can pass a pointer into a function but that is still pass-by-value. It is copying the value of the pointer, the address, into the function.

In C when passing a pointer, the syntax requires a dereference to be applied to get the value, whereas in true pass-by-reference languages such as Pascal.

[drsatyakarna]

Call by value actual parameters are passed. so a new memory area is created for the passed parameters in local memory(stack). so the actual parameters are not modified here.

call by reference we pass address of the variables. so the parameter passed is referenced to the original variable. so any changes made inside the function reflects in change of original variable as memory area is same