Avoiding Global Variables
How would I fix my program to avoid my variables being global?
(Note: I took out the actual code for viewing simplicity.)
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#include <iostream>
using namespace std;
float x, y, z; // Global Variables
void FunctionOne()
{
Equation (Example: x = y + 1)
}
void FunctionTwo()
{
Equation
}
void FunctionThree()
{
Equation
}
void FunctionFour()
{
Equation
}
int main()
{
int input, repeat;
do
{
cout << "1" << endl;
cout << "2" << endl;
cout << "3" << endl;
cout << "4" << endl;
cout << "5 Quit" << endl << endl;
cout << "You Choose: " << endl;
cin >> input;
switch (input)
{
case 1:
cin >> y;
FunctionOne();
break;
case 2:
FunctionTwo();
break;
case 3:
FunctionThree();
break;
case 4:
FunctionFour();
break;
case 5:
return 0;
default:
cout << "Error";
break;
}
cout << "Repeat? Enter 1";
cin >> runAgain;
if (repeat != 1)
{
return 0;
}
} while(repeat = 1);
}
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Last edited on
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float functionOne(float y)
{
return y + 1;
}
/* [...] */
//...
float x, y, z;
switch (input) {
case 1:
std::cin >> y;
x = functionOne(y);
//...
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You can pass arguments to functions by value and by reference, and return values from functions.
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