help, updating file via file pointer

Hi, I have this problem of file pointer not updating file, it just keep on writing the old file. For example, I punched in a couple of datas and hit the save file function(writes to a file recording the data), but when I keyed in the new datas and want to save again, the saved content is still the old one not the newly created data.

I have tried this fptr=fopen("data","w+"), it still does not update the new values into the file. Can anyone please help?

Can't help much without seeing the code...

Is it possible that you're writing to another copy of "data" (and looking in the wrong directory)?

it just a simple routine actually:

code:

Code:

---

void save_onto_file(void)
{
        FILE* fptr;
        int i;
        int temp;
       
        fptr=fopen("file-data","w+");
        if(!fptr)
        {      exit(101);}
        else
        {
                printf("create a new file\n");
          }
       
        for(i=0;i<=2;i++)
      { 
             
              temp=datas[i];
             
              fprintf(fptr,"%d %d\n",i,temp);
           
             
        }

---

Maybe you need to close the file at the end of save_onto_file():

fclose(fptr);

I tried that, but strangely it still doesn't solve the problem.