Shoutbox

Well i have this:

#include <stdio.h>
#include <conio.h>

void main(void)

{

float a,b;
clrscr();
scanf("%f%f", &a,&b);
printf("%f \n %f", a,b);

}

anyway what i need to do, is make the a and b switch. What i mean is for the rest of the program A will be what i entered for B and B will be what i entered FOR A.

Now i dont want you to tell me how to do this, just tell me if its possible and a tip maybe o.O

Set it in a globally defined variable?

What?

explain im new to this language.

I just removed float a and float b initialisation from the main function and put it above it, causing it to become a global variable.

code:

---

#include <stdio.h>
#include <conio.h>

float a;
float b;

void main(void)

{

clrscr();
scanf("%f%f", &a,&b);
printf("%f \n %f", a,b);

}

---

quote:

---

Originally posted by Ezra
Now i dont want you to tell me how to do this, just tell me if its possible and a tip maybe o.O

---

He wants the swapping function

The answer is as follows

code:

---

#include <stdio.h>
#include <conio.h>

void main()
{
float a,b;
clrscr();

printf("Enter values of a and b: ");
scanf("%f %f",&a,&b);

printf("\n\nBefore swapping\n");
printf("a = %f \nb = %f",a,b);

swap(&a,&b);

printf("\n\nAfter swapping\n");
printf("a = %f \nb = %f",a,b);

getch();
}

void swap(float *x, float *y)
{
float temp = x;
x = y;
y = x;
}

---

yeah well my job is to figure it out without swap but nvm dont tell me.

oh and i also cant do 3 letters

like float a,b,c

and then do

a=c
c=b
b=a

a = a + b;
b = a - b;
a = a - b;

google ftw.

lol that works eljay thanks


But i dont understand how that makes sence o.O

and what did u google to find that.

quote:

---

Originally posted by Eljay
a = a + b;
b = a - b;
a = a - b;

---

An example:
a = 4;
b = 6;
a = a + b; // 10
b = a - b; // 4
a = a - b; // 6
a == 6 && b == 4; // true