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Introduction A function is a named sequence of instructions that performs a specific task and returns the result of ts computation. Once defined, it can be then called in your program wherever that particular task should be performed A function can receive zero or more arguments. For example, consider a function sum which receives three arguments, here named a b and c and returns their sum int sum(int a, int b, int c) return atb To execute (or call) a function, you must supply its arguments. For example, if you want to compute the sum of 500, 600, and 700, you can write: sum(500, 600, 700) A complete program example: #include using nanespace std Defining a function that computes the sum of three integers int sum(int a, int b, int c) return a+bc int main) // Ne call it with the actual arguments 1, 20, 300 / and save the result in a variable int xsum(1, 20, 300) cout