Introduction A function is a named sequence of instructions that performs a specific task and returns the result of its 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 sun , which receives three arguments, here named a.b.and .and retunms their sum: int sum(int a, int b, int c) ( return abc 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 complote program example: include ciostream using nanespace stdi Defining a funetion that computes the aum of three integera int sum(int a, int b, int c) return a+b c int main) ( e call e with the aetual argunents 1,20, 300 and aave the reault in a varlable a int xsum(1,20, 300) cout