Turn if statements into functions

[rpierre2]

The code ask the user to choose a shape to draw, how would I turn the if statements into functions. By doing this can I then prompt the user to choose how many shapes they want drawn.

#include <iostream>
#include <math.h>
#include <iomanip>
#include <string>
#include <cstdlib>

using namespace std;
void printmessage ()
{
    cout<< "Good job thanks for playing:)";
}
int main()
{
	float shape = 0;
	int side_length, num_asterisk;
	int squareWidth, squareHeight;
	int size1, size2, totalRows, totalCols;
	int circle_radius;
	int number, rows, cols;

	cout << "Hello you will be prompt to draw a shape!" << endl;
	cout << endl;
	cout << "The shape will be drawn with the asterisk *" << endl;
	cout << endl;
	cout << "**************** MENU ******************" << endl;
	cout << "*                                  	*" << endl;
	cout << "*1) BOX (Filled)                   	*" << endl;
	cout << "*2) BOX (Not Filled)               	*" << endl;
	cout << "*3) BOX with an X inside           	*" << endl;
	cout << "*4) CIRCLE                         	*" << endl;
	cout << "*5) X                              	*" << endl;
	cout << "*                                  	*" << endl;
	cout << "**************** MENU ******************" << endl;

	do
	{
    	cout << "Enter a number from the menu above to begin drawing a shape: ";
    	cin >> shape;
    	cout << endl;
	}while(shape < 1 || shape > 5);

if(shape == 1)
{
	cout << "You choose to draw a Box Filled!!!" << endl;
	do
	{
 	cout << "Enter the length for the side of the box: ";
 	cin >> side_length;
 	cout << endl;
	}while (side_length <= 1);

	num_asterisk = side_length * side_length;

	for (int i = 1; i < num_asterisk + 1; i++ )
	{
    	cout << "*";
    	if((i %side_length) == 0)
    	{
        	cout << "\n";
    	}
	}
}
else if(shape == 2)
{
	cout << "You choose to draw a Box not Filled!!!" << endl;
do
{
	cout << "Enter Height of the box:  ";
	cin >> squareHeight;
	cout<<endl;
}while(squareHeight <= 1);

do
{
	cout << "Enter Width of the box:   ";
	cin >>  squareWidth;
	cout<<endl;
}while(squareWidth <= 1);

  for(int width=1; width<=squareHeight; width++)
	{
   if(width <= 1)
   for(int width=1; width<=squareWidth; width++)
        	{
            	cout<< "*";
        	}
    	else if(width<squareHeight)
    	{
        	cout<< endl;
for(int width2=1; width2<=squareWidth; width2++)
       	{
  	if(width2==1 || width2==squareWidth)
                	cout<< "*";
            	else
                	cout<< " ";
       	}
    	}
    	else
    	{
        	cout<< endl;

for(int width3=1; width3<=squareWidth; width3++)
        	{
            	cout<<"*";
        	}
    	}
	}
}

else if(shape == 3)
{
cout << "You choose to draw a Box with an X inside!!!" << endl;
do
{
cout << "Enter an odd number greater than 4 for the size: ";
cin >> size2;
}while(size2<5);
cout <<endl;

for (int i=0; i<=size2; i++) cout << "*";
cout <<endl;

size1 = size2 - 1;

for (int totalRows = 1; totalRows <= size1; totalRows++) {
cout << "*";

for (int totalCols = 1; totalCols <= size1; totalCols++)
{
if (totalRows == totalCols || totalCols == (size1 + 1) -
totalRows) cout << "*";
else cout << " ";
}
cout << "*\n";
}
for (int a=0; a<=size2; a++) cout << "*";
}

else if(shape == 4)
{
	cout << "You choose to draw a Circle!!!" << endl;
	do
	{
   cout << "Enter a number greater than 1 for the radius: " << endl;
   cin>> circle_radius;
	}while(circle_radius<=1);

for (int c = 0; c <= 2*circle_radius; c++)
{
	for (int j = 0; j <= 2*circle_radius; j++)
	{
     	float distance_to_centre = sqrt((c - circle_radius)*(c - circle_radius) + (j - circle_radius)*(j - circle_radius));
    	if (distance_to_centre > circle_radius-0.5 && distance_to_centre < circle_radius+0.5)
    	{
         	cout << "*";
    	}
    	else
    	{
         	cout << " ";
    	}
	}
	cout << endl;
}
}

else if(shape == 5)
{
	cout << "You choose to draw a X!!!" << endl;
	do
{
 cout<< "Enter a number at least 3 for the size: ";
 cin>> number;
}while(number<3);
	for( int rows=1; rows<=number; rows++)
	{
    	for (int cols=1; cols<=number; cols++)
    	{
        	if(rows==cols || cols==(number+1)-rows)
            	cout << "*";
        	else
            	cout << " ";
    	}
    	cout << endl;
	}
}

printmessage ();
return 0;
}

[SamuelAdams]

You can take all the code in main, put it in a function and most of the time it works pretty good. you may have to move/fix some variable variable declarations.


#include <iostream>
#include <math.h>
#include <iomanip>
#include <string>
#include <cstdlib>

using namespace std;
int myfunction ()
{
// code here
}

int main ()
{
myfunction();
return 0;
}