Question

I’m trying to assign input to a number of structures with an array of pointers, pointing to each allocated structure. I’ve been attempting to fill one structure and printing it, but keep getting errors and can’t find out why. Any ideas?

Thanks for the help.

/* Structure declaration */

struct personCatalog {
  char name[50];
  char address[50];
  char cityState[50];
  char zipCode[7];
} ;

//function to fill structures

void getPerson (struct personCatalog *ArrayOfPointers[]);

   int main(int argc, const char * argv[])
 {

struct personCatalog *pointerArray[51]; 

getPerson(pointerArray);

 }

void getPerson (struct personCatalog *ArrayOfPointers[]){

struct personCatalog *tempPointer;

char stringCollector[512];

int maxNumberOfPeople = 51;
int num = 0;

while ((gets(stringCollector) != NULL) && (num < maxNumberOfPeople)) {

    tempPointer = (struct personCatalog *) malloc(sizeof(struct personCatalog));
    strcpy(tempPointer->name, stringCollector);
    gets(tempPointer->address);
    gets(tempPointer->cityState);
    gets(tempPointer->zipCode);

    ArrayOfPointers[num] = tempPointer;

    num++;

    printf("%s", ArrayOfPointers[num]->name);
    printf("%s", ArrayOfPointers[num]->address);
    printf("%s", ArrayOfPointers[num]->cityState);
    printf("%s", ArrayOfPointers[num]->zipCode);

}

 ArrayOfPointers[num] = '\0';
}

Answer 1

Corrected it a little bit, try it out, but more work to do….

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/* Structure declaration */

struct personCatalog {
  char name[50];
  char address[50];
  char cityState[50];
  char zipCode[7];
} ;
const int maxNumberOfPeople = 3; // was 51;

//function to fill structures

void getPerson (struct personCatalog *ArrayOfPointers[]);

int main(int argc, const char * argv[]) {

  struct personCatalog *pointerArray[maxNumberOfPeople];

  getPerson(pointerArray);

}

void getPerson (struct personCatalog *ArrayOfPointers[]){
  struct personCatalog *tempPointer;
  char stringCollector[512];
  int num = 0;

  while ((num < maxNumberOfPeople) && (gets(stringCollector) != 0) ) {

    tempPointer = (struct personCatalog *) malloc(sizeof(struct personCatalog));
    strcpy(tempPointer->name, stringCollector);
    gets(tempPointer->address);
    gets(tempPointer->cityState);
    gets(tempPointer->zipCode);

    ArrayOfPointers[num] = tempPointer;


    printf("name      %s\n", ArrayOfPointers[num]->name);
    printf("address   %s\n", ArrayOfPointers[num]->address);
    printf("cityState %s\n", ArrayOfPointers[num]->cityState);
    printf("zipCode   %s\n", ArrayOfPointers[num]->zipCode);

    num++;
  }
  //ArrayOfPointers[num] = '\0'; this crashed at end of array
}