add 2 FLOAT variables

[sevak316]

I am difficulty adding 2 variables which are type float.

help.


float a, b, total;

a = 1.5;
b = 1.5;
total = 0;
printf("total = %f", sum(a,b));

float sum(float a, float b)
{
return total= a + b;
}

[Ganon11]

Your function isn't working properly because you don't have a good understanding of what a function does. Inside sum(), total doesn't exist. Also, you are returning a value, but you are not capturing the return value. Go to a basic tutorial on functions and read it.

[sevak316]

//total is a global variable;

what about now?

[sevak316]

#include <stdio.h>

float sum(float x, float y);

float a = 1.5;
float b = 1.5;
float total = 0;


main()
{
printf("total = %f", sum(a,b));
system("pause");
}

float sum(float x, float y)
{
return total = x + y;
}

this worked.

and YES, total was recognized in sum. ;-)

[Banfa]

But it is very poor practice to store the output of a function in a global variable like that. The total global variable is unrequired in your simple example.

Global data in general is bad practice and should be avoided so having a and b as globals when they could be local to main is bad practice.

[sevak316]

It was for demonstration/practice purposes only.

[Banfa]

Get into the habit of using best practice even for unimportant code, then you will be less likely to introduce bugs when the code you are writing is important.