[6.10] Always error with C Backend

[al2791]

With this code I have an error ;

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CompilerIf #PB_Compiler_ExecutableFormat<>#PB_Compiler_Console 
  CompilerError "Exec-Format must be Console in Compiler-Option"
CompilerEndIf  

! int fact(int n) {
!   if(n>=1) 
!     return n*fact(n-1); 
!   else return 1; 
! }

OpenConsole()
! int number;
! printf("Enter a positive integer: ");
! scanf("%d",&number);
! printf("Factorial of %d = %d", number, fact(number));
Input()
CloseConsole()

Error ; Unresolved external symbol ‘scanf’ – referenced from
‘PureBasic.obj’,
POLINK : fatal error : 1 unresolved external(s)


With 6.04 LTS C backend this program is ok

[jassing]

Not ideal..

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OpenConsole()
! printf("Enter a positive integer: ");
number=Val(Input())
! printf("Factorial of %d = %d", v_number, fact(v_number));
Input()
CloseConsole()

A lot of what is considered "standard" functions are not available in PB's C

[Fred]

This is not a bug, using such functions without proper declaration doesn't always work.

[infratec]

Have you ever tried to run this code

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int fact(int n) {
  if(n>=1) 
    return n*fact(n-1); 
  else return 1; 
}


int main(void) {

 int number;
 printf("Enter a positive integer: ");
 scanf("%d",&number);
 printf("Factorial of %d = %d", number, fact(number));
 return 0;
}

With a C compiler

Tell us the error messages.

[juergenkulow]

gcc version 11.4.0 (Ubuntu 11.4.0-1ubuntu1~22.04):

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Enter a positive integer: 5 
Factorial of 5 = 120k

[jassing]

This is not a bug, using such functions without proper declaration doesn't always work.

Even with declaration, it's still not linked.

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! int __cdecl scanf(const char * restrict, ...);
! int __cdecl printf(const char * restrict, ...);

printf() links fine.