Re: Segmentation fault

From:
LL <10464307@uts.edu.au>
Newsgroups:
comp.lang.c++
Date:
02 Mar 2009 09:36:35 GMT
Message-ID:
<49aba8a2$0$3253$afc38c87@news.optusnet.com.au>
On Mon, 02 Mar 2009 00:36:05 -0800, zr wrote:

On Mar 2, 9:01??am, LL <10464...@uts.edu.au> wrote:

#include <stdio.h>

float* dup(float* farr[], int n) {
?? float* fdarr;
?? for (int i=0; i<n; i++) {
?? ?? fdarr[i]=*farr[i];
?? }
?? return fdarr;

}

main() {
?? float *f1=new float(1.0);
?? float *f2=new float(2.0);
?? float *f3=new float(3.0);
?? float* farr_s[]={f1,f2,f3};

?? float* fdarr_s;
?? fdarr_s=dup(farr_s,3);

?? for (int i; i<3; i++) {
?? ?? printf("%f ", fdarr_s[i]); // Segmentation fault
?? }

}


replace:
 float* fdarr;
with:
 float* fdarr = new float[n];


Still gives segmentation error. I made three changes.

#include <stdio.h>

float* dup(float* farr[], int n) {
  float* fdarr=new float[n]; // Change 1
  for (int i=0; i<n; i++) {
    fdarr[i]=*(farr[i]); // Change 2
  }
  return fdarr;
}

main() {
  float *f1=new float(1.0);
  float *f2=new float(2.0);
  float *f3=new float(3.0);
  float* farr_s[]={f1,f2,f3};

  float* fdarr_s=new float[3]; // Change 3
  fdarr_s=dup(farr_s,3);
  
  for (int i; i<3; i++) {
    printf("%f ", fdarr_s[i]); // should be 1.0 2.0 3.0
  }
}

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