(Homework Solution): Question: Consider the following code. Why would you get identifier not found errors? int main() { int num1…

Consider the following code. Why would you get identifier not found errors?

int main()

{
int num1 = 1;
int num2 = 2;
int total = 0;
std::cout << “total = ” << total << std::endl;
total = addition(num1, num2);
std::cout << “After addition(num1, num2), total = ” << total << std::endl;
}

int addition (int a, int b)
{
int r;
r = a + b;
return r;
}

A. Because the function call does not match the function definition.
B. Because variable a is not defined in the body of the even and odd functions.
C. Because the function is not declared prior to the function call. Their prototype is needed above main.
D. Because the variable i is not initialized to a valid integer value before it is used.

Expert Answer

answers

Dear Student ,

As per the requirement submitted above , kindly find the below solution.

Question :

Answer : C. Because the function is not declared prior to the function call. Their prototype is needed above main.

Explanation : In C++ either need to give defination of function before function call or if defination of function is given after the function call then need to given the prototype for the function above the main. As given below

int addition (int , int);

Below is the modified c++ progarm which compiles successfully and gives the output

#include <iostream>
//function prototype
int addition (int , int);
//main method
int main()
{
int num1 = 1; //variable num1 of integer type
int num2 = 2; //variable num2 of integer type
int total = 0; //variable total
std::cout << “total = ” << total << std::endl; //print value of total before function call
total = addition(num1, num2); //function call
std::cout << “After addition(num1, num2), total = ” << total << std::endl;// display total
}
int addition (int a, int b) //function defination
{
int r; //declaring variable r
r = a + b; //adding two variables
return r; // return r
}

======================================================

Output : Compile and run program will get the screen as shown below

Screen 1 :

<>source code close shor 1 #include <iostream> 2 IIfunction prototype 3 int addition (int, int); 4 //main method 5 int main() 7 int num1 1; //variable numl of integer type int num2 = 2; //variable num2 of integer type 9 int total 0; //variable total 10 std : : coutくくtotal-くくtotalくくstd:: endl; //print value of total before function call 11 total = addition (numi, num2); //function call 12 std: :cout << After addition(numi, num2), total-くくtotalくくstd:: endl;// display total 13 14 int addition (int a, int b) //function defination 15 16 int r; //declaring variable r 17 r a b; //adding two variables 18 return r; // return r 19 clear the output input output Success #stdin #stdout 0s 15232KB total 0 After addition(num1, num2), total 3

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