Thread: Having problems with the basics.

Hello everyone,
I am new in programming and started with C. but i am having some problems with the basics since i am studing on my own with no teacher thus online support is the only key.
Following are the doubts i am having:-

1) For the code below there was not output,the screen flashed and i was back on coding screen

Code:

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

main()
{
        return(printf("AMAZING!!"));
}

but without running it again i immediately changed it to

Code:

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

main()
{
       printf("AMAZING!!");
}

i got the result as

AMAZING!!
AMAZING!!

Please help me understand this

Well you should write it normally for starters. Make sure that main returns an integer 0 and write the return type before main(). I don't have an explanation for why the output prints twice, but I am willing to blame not following the rules as a cause.

5) Throw away Turbo C(/++) and get a new compiler. Using a 20+ years old compiler/IDE is going to teach you a lot of bad practices and invalid techniques.

I agree with Laserlight, that is definitely it.. I helped a friend (&&...Turbo C victim) out yesterday..and was confused by this exact same thing.

Thank you, i will take care of that but here is my next doubt
2) I wrote this code to take radius of a circle and print the area using function area of return type float.

Code:

#include<stdio.h>
#include<conio.h>
float area(float);

#define PI 3.14

int main()
{
float rad, ar;
printf("Enter the radius of circle : ");
scanf("%d"&rad);

ar = area(rad);
printf("Area of Circle with Radius %f is %f", rad, area);
getch();
}

float area(float r)
{
float a;
a = PI * r * r;
return(a);
}

sorry but my code was not showing the result on console without using conio and getch........

secondly as you can see i have written the name of the function(area) without the arguments inplace of the variable ar in line 14...at first i did it by mistake but when i realised it i was confused for y was it not showing an error.I hope you can help me in this.

Sorry for the delay, my internet connection was showing problems.
Thank you all for your valueble answers but i would also request you to suggest a nice IDE for C language.
Thanking you again.

Originally Posted by deepak_007

suggest a nice IDE for C language.

If you are a Linux User:
KDevelop
Eclipse
Code::Blocks
Anjuta
(or any of the 'smart' text editors and the terminal)

If you use Windows:
Code::Blocks
Pelles C
Visual Studio
Eclipse