k=fu(x); i have problem with this function in the code the value is zero all the time can you please see what is wrong

#include<stdio.h>
#include<math.h>
double area(double x,double y);
int fu(int l);
int main(){
double x ,y ,z,k;
printf("enter two number");
scanf("%lg%lg",&x,&y);
z=area(x,y);
k=fu(x);
printf("area is z =%lg and k is%d",z,k);
return 0;

}
double area(double x,double y){
double z;
z=x*y;
return z;}
int fu(int l){
return l+l;}

 

Why are you still posting your code in attachments and not posting them in line like kubeek showed you in this thread?

http://forum.allaboutcircuits.com/showthread.php?t=75644


What happens when you debug the code? What are the values of x,y and z, before and after the function is called?

 

What software are you using?

I strongly suggest to use the debugger in single-step mode.

Then OP could write "I used the debugger, the variable a obtained the value blabla, but then in the line containing the code foobar, it is changing to 12345, and I don't properly understand why.

This is called "isolating the problem".

It is still a small piece of code. But confronting readers of a forum post with code; without explanation how it has been worked at, what happened, what exactly is unclear, at times can be rude.

OP write the value is zero at all times. Great. Some explanation.
In which line do you expect it to change to what value, and why? And what happened instead?

 

Why are you still posting your code in attachments and not posting them in line like kubeek showed you in this thread?

http://forum.allaboutcircuits.com/showthread.php?t=75644


What happens when you debug the code? What are the values of x,y and z, before and after the function is called?

how can i post like this

 

how can i post like this

What did you find when you looked at the note "Sticky: Use of CODE tags" at the top of this section? And the use of capital letters and punctuation would make your messages easier to read.

One thing I saw in your code was an attempt to print a C double quantity with a %d format.