Program to swap two variables using function call by reference

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Reference Materials iostream. Previous Tutorial:. Next Tutorial:. The std:: vector ::swap function is used to swap the entire contents of one vector with another vector of same type and size. In computer programming , the act of swapping two variables refers to mutually exchanging the values of the variables. Usually, this is done with the data in memory. The call by reference method of passing arguments to a function copies the reference of an argument into the formal parameter.

Inside the function, the reference is used to access the actual argument used in the call. This means that changes made to the parameter affect the passed argument. What does the inline keyword do? With inline keyword, the compiler replaces the function call statement with the function code itself process called expansion and then compiles the entire code.

They use contiguous storage locations for their elements, which means that their elements can also be accessed using offsets on regular pointers to its elements, and just as efficiently as in arrays. What is swap programming? In computer programming, the act of swapping two variables refers to mutually exchanging the values of the variables.

For example, in a program, two variables may be defined thus in pseudocode :. This function basically swaps two numbers, how we normally take a temporary variable in C to swap 2 nos. Hence after calling the swap function, you can see that the values n1 and n2 inside the main remain unchanged. Skip to content. Want to Ace your next Coding Interview? C program to swap two numbers using call by value This C program is to swap two numbers using call by value.