I need help!!
a program that uses data from a file to fill an array of structures, then uses these to put icons pictures on the screen. I must use a structure definition:
, then read and store all the icon data before displaying them on the screen. Ok I know how to call to files thats cool and I know how to create functions. I am not sure how to use the data from the file and fill an array of structures. So can someone help me?
The code did not attach so here it is
Errr......
we can help you but you'd first have to say how far with the work you've gone and what problems you're having.
Remember we're not here to do your homework just to help you learn. so post what it is you want help with and we'll help.
A hundred Elephants can knock down the walls of a fortress... One diseased rat can kill everyone inside
Code:#include <stdio.h> #include <string.h> #include <ctype.h> void atbash(char *in, char *out); int main(void) { char out[100]; atbash("abcdefghijklmnopqrstuvwxyz", out);//You're passing this by value, hence you'll never see output on screen printf("%s", out); getchar(); return 0; } void atbash(char *in, char *out) { int len = strlen(in); /*en holds length of encrypt*/ for (len--; len >= 0; len--){ *out = in[len]; out++; Also i removed the * as that is a reference to the value not the memory address which is what you want to be incrementing } *out = '\0'; /*ULL terminiate*/ }
Last edited by WDT; 03-09-2004 at 10:29 PM.
A hundred Elephants can knock down the walls of a fortress... One diseased rat can kill everyone inside
1) Every array is passed as a pointer to a memory address and not passed by value. This includes constant arrays. Only way to get around this is to put it inside a structure and pass the structure.atbash("abcdefghijklmnopqrstuvwxyz", out);//You're passing this by value, hence you'll never see output on screen
2) When making comments on someone's code please make sure to use proper comment codes and try to avoid long sentences so it won't cause horizontal scrolling.
>Every array is passed as a pointer to a memory address and not passed by value.
Technically an array isn't passed at all. A pointer to the first element is passed by value. You can then use pointer arithmetic to get to the rest of the array.
My best code is written with the delete key.
Sorry my mistake, prelude's right. In anycase discard that thought, I knew that but I actually don't know why I wrote that. (Must be the wrong time of day to post @ 0429hrs.) The last correction applies and then pause the console, e.g. getchar(); before the return statement in main and you should be able to see the results.
A hundred Elephants can knock down the walls of a fortress... One diseased rat can kill everyone inside
