Need some help with a mathematic function

[warburp]

Hello i am trying to write my first "mostly" unassisted and copy pasted program but i am having some issues i have the following function but it obviously breaks when the user inputs values that would cause divide by zero

void func1 (float YA, float YB, float XA, float XB, float& top, float& bot, float& slope)
{
top = YA-YB;
bot = XA-XB;
slope = top/bot;

}


i had tried editing and if statement in like so

void func1 (float YA, float YB, float XA, float XB, float& top, float& bot, float& slope)
{
top = YA-YB;
bot = XA-XB;
if (bot=0)
{
cout << "slope is undefined";
}
else
{
slope = top/bot;
}

}

but then no matter what value you input the output value is 1.#inf just looking for how i would go about doing this/if im evel close to the right track

[Branflakes91093]

change if(bot=0) to if(bot==0)

= is for assignment, == is for comparison

[warburp]

i tried your suggested solution the program output a crazy scientific expression instead of stopping and outputting undefined slope

[Hippogriff]

What numbers are you entering into it? The scientific expression might be the correct answer if the bottom is not equal to 0. You can put cout << fixed << 'variable', to make sure it's shown in decimal form.

[warburp]

yes i know the answer should have been 1.5 i input YA=6 XA=6 YB=4 XB=3 and would output that but i was able to fix it after thinking about what branflake explained to me here is my end program (yes i know there is prolly 300things i could do better)

#include<iostream>
#include<sstream>
#include<string>
#include<math.h>
using namespace std;

long func1 (float YA, float YB, float XA, float XB, float& top, float& bot, float& slope)
{
top = YA-YB;
bot = XA-XB;
while (bot==0)
{
cout << "Slope is undefined" << endl;

system("pause");

return 0;
}
slope = top/bot;
}

int main ()
{
float XA;
float XB;
float YA;

float YB;
float X;
float Y;
float Z;
cout << "Enter X 1 >";
cin >> XA;
cout << "Enter Y 1 >";
cin >> YA;
cout << "Enter X 2 >";
cin >> XB;
cout << "Enter Y 2 >";
cin >> YB;
func1 (YA, YB, XA, XB, X, Y, Z);
if (Y==0)
{
return 0;
}
else
{
cout << "The slope of the line between your two points is > " << Z << endl;
}

system("PAUSE");

return 0;
}

Such as i adjusted the if then statement to output my slope is undefined vs the while statement