Can't find what is wrong with my program! It won't run. I think that it has something to do with division?? 

a few rules to follow:

All functions must be void functions.

Nocinorcoutstatementsinint main.

No global variables.

As a consequence, all your functions that need to return a value will have to handle that via pass-by-reference parameters.

Implement the following functions:

void menu(int& usrChoice); Outputs the main menu and then stores the value the user inputted in usrChoice.

void getNums(int& a, int& b); Asks the user to enter values for a and b and stores the responses in the corresponding variables.

void add(int a, int b); Adds the values of a and b and outputs the result.

void sub(int a, int b); Subtracts b from a and outputs the result.

void mul(int a, int b); Multiplies a by b and outputs the result.

void div(int a, int b); Divides a by b and outputs the result.

Dont alter the prototypes. Get your program to match the following output and also to be able to handle different values of a and b according to the menu actions the user chooses.

Sample Output (user input is italicized)

==Main Menu== 1 - add 'a' to 'b' 2 - subtract 'b' from 'a' 3 - multiply 'a' by 'b' 4 - divide 'a' by 'b' 5 - exit >1 Enter number a: 4 Enter number b: 5 a+b=9

==Main Menu== 1 - add 'a' to 'b' 2 - subtract 'b' from 'a' 3 - multiply 'a' by 'b' 4 - divide 'a' by 'b' 5 - exit >2 Enter number a: 10 Enter number b: 3 a-b=7

==Main Menu== 1 - add 'a' to 'b' 2 - subtract 'b' from 'a' 3 - multiply 'a' by 'b' 4 - divide 'a' by 'b' 5 - exit >3 Enter number a: 4 Enter number b: 5 a * b = 20

==Main Menu== 1 - add 'a' to 'b' 2 - subtract 'b' from 'a' 3 - multiply 'a' by 'b' 4 - divide 'a' by 'b' 5 - exit >4 Enter number a: 101 Enter number b: 20 a / b = 5.05

This is my code: #include using namespace std; // Displaying menu and reading users choice void menu(int& usrChoice) { cout<<" ==Main Menu=="<"1 - add 'a' to 'b'"<"2 - subtract 'b' from 'a'"<"3 - multiply 'a' by 'b'"<"4 - divide 'a' by 'b'"<"5 - exit"<>usrChoice; } // Reading numbers void getNums(int& a, int& b) { cout<<"Enter number a: "; cin>>a; cout<<"Enter number b: "; cin>>b; } // calculating addition void add(int a, int b) { cout<<"a+b="<// calculating substraction void sub(int a, int b) { cout<<"a-b="<//calculating multiplication void mul(int a, int b) { cout<<"a*b="<//calculating division void div(int a, int b) { cout<<"a/b="<int main() { // continues the loop until the user want to exit from it (means enter choice 5)  while(true) { int usrChoice; //reading users choice  menu(usrChoice); switch(usrChoice) { int a,b; case 1: getNums(a,b); add(a,b); break; case 2: getNums(a,b); sub(a,b); break; case 3: getNums(a,b); mul(a,b); break; case 4: getNums(a,b); div(a,b); break; case 5: exit(0); } } return 0; }