Basic question: some unknown error

[Poincare]

#include <stdio.h>
/*  C program to print the first n Fibonacci Numbers. */
void main(void){
  int k,n;
 
  printf("How many Fibonacci number do you want listed? ");
  scanf("%i",&n);
  int  fib[n] = {1,1};
  for (k = 2; k < n; k++) /* the ++ is the increment operator */
	fib[k] = fib[k-1] + fib[k-2];
  /* print the results, four per line */
  for (k = 0; k < n;++k)
  {
  if (k % 4 == 0)
	printf("\n");
  printf("%8i", fib[k]); /* that’s 8 ints */
  } /* end of for loop */
  printf("\n");
} /* end of main */

That's just a basic program that was made to print Fibonacci numbers. I modified it a bit. When I compile it, I get the error "error: variable-sized object may not be intialized" what does this mean?

[MK27]

Hey here's the other way:

#include <stdio.h>

int fib (int num) {
	int x=-1, y=-1;
	if (num <= 2) {
		return 1;
	}
	x=fib(num-1); y=fib(num-2);
	return x+y;
}

int main (int argc, char *argv[]) {
	printf("answer: %d\n", fib(atoi(argv[1])));
	return 0;
}

It doesn't print the sequence but you could use it that way, eg.
[root~/C/models] ./a.out 20
answer: 6765

[MK27]

When I compile it, I get the error "error: variable-sized object may not be intialized" what does this mean?

I imagine it involves this:

printf("How many Fibonacci number do you want listed? ");
  scanf("%i",&n);
  int  fib[n] = {1,1};

Here's another one that does the sequence:

#include <stdio.h>

int main () {
	int a=0, b=1, n=a+b,i,ii;
	puts("Number of iterations");
	scanf("%d",&ii);
	printf("%d %d ",a,b);
	for (i=0;i<ii;i++) {
		n=a+b;
		printf("%d ",n);
		a=b;b=n;
	}
}

[root~/C/models] ./a.out
Number of iterations
12
0 1 1 2 3 5 8 13 21 34 55 89 144 233

[tabstop]

#include <stdio.h>
/*  C program to print the first n Fibonacci Numbers. */
void main(void){
  int k,n;
 
  printf("How many Fibonacci number do you want listed? ");
  scanf("%i",&n);
  int  fib[n] = {1,1};
  for (k = 2; k < n; k++) /* the ++ is the increment operator */
	fib[k] = fib[k-1] + fib[k-2];
  /* print the results, four per line */
  for (k = 0; k < n;++k)
  {
  if (k % 4 == 0)
	printf("\n");
  printf("%8i", fib[k]); /* that’s 8 ints */
  } /* end of for loop */
  printf("\n");
} /* end of main */

That's just a basic program that was made to print Fibonacci numbers. I modified it a bit. When I compile it, I get the error "error: variable-sized object may not be intialized" what does this mean?

It means what it says -- the variable sized object fib[n] cannot be initialized. Just do fib[0] = fib[1] = 1 after it, making sure of course that some idiot user didn't type -147 for n first.

[zacs7]

[root~/C/models] ./a.out
Number of iterations
12
0 1 1 2 3 5 8 13 21 34 55 89 144 233

I sure hope you aren't actually root...

[MK27]

I sure hope you aren't actually root...

Better me than some dumb ass.

[happyclown]

You're 11 years old, and you're playing with Fibonacci numbers?

That's impressive.

[rags_to_riches]

int main() not void main().

[matsp]

That's just a basic program that was made to print Fibonacci numbers. I modified it a bit. When I compile it, I get the error "error: variable-sized object may not be intialized" what does this mean?

  int  fib[n] = {1,1};

It is this line - since fib[n] is defined by the user-entered size (which, by the way, could be less than 2), the compiler can't produce the code to fill fib[].
You could do

int fib[n];
fib[0] = 1;
fib[1] = 1;