Thread: Help with structs.

  1. #1
    Registered User
    Join Date
    Jan 2011

    Help with structs.

    I have a problem with sturcts.
    I have something like :
    struct stack1 
       int number;
       struct stack1 *next;
    I want to create structs as user request.
    I mean, i`ll get some number from the user input, and create this number of startcts.
    For example, i got the number 3 from the user.
    Automaticly create :
    stack1 s1; stack1 s2; stack1 s3; ( 3 structs ).
    I dont care the structs names.
    I hope the explanation was clear, Thanks for helpers.

  2. #2
    C++ Witch laserlight's Avatar
    Join Date
    Oct 2003
    Create a dynamic array of struct stack1.
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
    Look up a C++ Reference and learn How To Ask Questions The Smart Way

  3. #3
    Registered User
    Join Date
    May 2011
    Around 8.3 light-minutes from the Sun
    Not really. Are you trying to create a linked list of structures? If that is the case take a look at this tutorial. If you are just trying to dynamically allocate an array of structures you would need something like this:
    #include <stdio.h>
    #include <stdlib.h>
    struct myStruct{
    	int i;
    int main(void){
    	struct myStruct *ptrStruct = malloc(2*sizeof(myStruct));	
    	ptrStruct[0].i = 3;
    	ptrStruct[1].i = 4;
    	for(int i=0;i<2;i++)
    		printf("%d\n", ptrStruct[i].i);
    EDIT: Of course you would check the return value of malloc to ensure you actually got the memory you requested.
    Last edited by AndrewHunter; 07-19-2011 at 11:48 AM.
    Quote Originally Posted by anduril462 View Post
    Now, please, for the love of all things good and holy, think about what you're doing! Don't just run around willy-nilly, coding like a drunk two-year-old....
    Quote Originally Posted by quzah View Post
    ..... Just don't be surprised when I say you aren't using standard C anymore, and as such,are off in your own little universe that I will completely disregard.
    Warning: Some or all of my posted code may be non-standard and as such should not be used and in no case looked at.

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