Answer to Question #171769 in C++ for ADITYA MATHUR

Question

Write a function that, when you call it, displays a message telling how many times it has been called: “I have been called 3 times”, for instance. Write a main()program that calls this function at least 10 times. Try implementing this function in two different ways. First, use a global variable to store the count. Second, use a local static variable. Which is more appropriate? Why can’t you use a local variable.

Answer 1

Fix typo

#include <iostream>
using namespace std;


int funCalls=0;


void fun1() {
    funCalls++;
    cout << "I am fun1 and I have been called " << funCalls << " times" << endl;
}


void fun2() {
    static int funCalls=0;
    funCalls++;
    cout << "I am fun2 and I have been called " << funCalls << " times" << endl;
}


int main() {
    for (int i=0; i<10; i++)
        fun1();


    cout << endl;
    for (int i=0; i<10; i++)
        fun2();
}
// The second approach is more suitable as nobody can't change the value 
// of the variable count. 
// A local variable can't be used as it "forgot" its value everytime 
// the functon is called.