Jefferson Mendoza wrote:
> #include<stdio.h>
> #include<conio.h>
>
"conio.h" is not a standard header. You are better served by using
standard C functions for I/O, which it appears you are anyway.
> #include<stdlib.h>
> #include<string.h>
>
> #define xd 0.01
>
My preference (yours may be different) is to define a constant, not a
preprocessor definition. Maybe that's just the Java in me trying to get
out, but even when I code C/C++ I try to avoid macros except where I
cannot do something in the language itself.
> int main()
> {
> int x2;
> int y0=1;
> int y1=0;
>
>
>
>
> float f1(float y1, float y0);
> float prog(void);
> char buff[BUFSIZ];
>
> printf("enter value of x:");
> x2 = atof(gets(buff));
>
At this point you are still in main() but define a nested function: this
is illegal syntax in C.
> /* This is the main formula */
>
> float f1(float y1, float y0)
> { float ans1, ans2, ans3;
>
> ans1 = -y0;
>
> ans2 = (ans1 * xd) + y1;
>
> ans3 = (y1 * xd) + y0;
>
> return ans3;
> }
>
>
>
> float prog()
> {
>
> float x1 = xd + x2;
>
Variable "x1" is not defined in scope at this point. Come to think of
it, it is not defined at all.
> do {
> z = f1(y1,y0);
>
Neither is "z".
> } while ( z >= x1 );
>
> return x1;
> }
>
--
John Gaughan
