Learning how to Code: Question!

[QBit]

Hello I have written a small Addition Program for Amiga Computers.. I managed that it runs with Integer but I don't know how to manage float Operations with vbcc!

This Code works:

#include <stdio.h>
int main(void) {
  int a; int b; int res;
  printf("\\n\\nWelcome to Amiga Micro Add V.0.0.1\\n\\\n"); 
  printf("\\nPlease enter a Number for Addition : ");
  scanf("%d",&a);
  printf("\\nPlease enter a second Number for Addition: ");
  scanf("%d",&b);
  res = a + b;
  printf("\\nThe result is: %d\\n", res);
  return 0;
}

But this don't:

#include <stdio.h>
#include <stdlib.h>
int main(void) {
  float a; float b; float res;
  printf("\\n\\nWelcome to Amiga Micro Add V.0.0.2\\n\\n");
  printf("\\nPlease enter a Number for Addition : ");
  scanf("%f",&a); printf("\\nPlease enter a second Number for Addition: ");
  scanf("%f",&b);
  res = a + b;
  printf("\\nThe result is: %f\\n", res);
  return 0;
}

The VBCC Compiler complains: Error 21 Reference to undefined symbol __ieees2d. vlink error

I did it with WinUAE configured with a 68040 CPU!

[QBit]

Solved!

Both Codes are correct!

I found the Error you have to compile with the -lmieee Option

Compile Command:
vc -o microadd.exe microadd.c -lmieee

then it works!

[phx]

Originally Posted by QBit

I found the Error you have to compile with the -lmieee Option

Explanation: The standard clib (vc.lib) does not include floating point support to keep programs small. When linking with the mlib (mieee.lib for soft-float) several functions (like printf, scanf, etc.) are replaced by extended versions with floating point included.

[Hewitson]

QBit: Can you please post the file sizes of both executables? I'm interested to see how much -lmieee increases the file size.

[QBit]

Hewitson, the Integer version without -lmieee has 12.876 bytes as exe,, and the float with -lmieee Option has 18.780 bytes! Quite big Monsters of Programms! *lol*