Thread: pointer to array of structure

Hello, I am not sure why I am not able to print member structure member aa. Can someone please help? Code and output below:

Code:

#include <ansi_c.h>
// Structuer passing example

typedef struct
{
    char t[10];
    int w, h, a;
    char *aa;
} area; // area is declared to be of type struct


void assign(void); // prototypes 
area table[20]; // declare an array of 20 area's
area (*p)[20] = &table; // declare and define pointer-to-array of 20 area's

void assign()  // use it
{
    char str[10],str2[10];
    
    for(int i=0; i<20; i++)
    {
        sprintf(str,"T%d\0",i);
        strcpy((*p)[i].t,str);
        (*p)[i].w = i; // dereference p to get to table, 
                            // [i] to access i-th structure and 
                            // .w to get the w member of it 
        (*p)[i].h = i;
        (*p)[i].a = (*p)[i].w*(*p)[i].h;
        sprintf(str2,"A%d\0",i);
        (*p)[i].aa = str2;
        printf("aa[%d]=%s\n",i,(*p)[i].aa);
    }
}

int main(void)
{
    assign();   // initial table
    
    if(&p != NULL)
    {                                        
        printf("No.  TT W * H = Area  AA\n========================\n");
        for(int j=0; j<20; j++)
        {
            printf("[%2d] %-3s %2d %2d   %3d %3s\n",j, (*p)[j].t,(*p)[j].w,(*p)[j].h,(*p)[j].a,(*p)[j].aa);  // why doest this work aa (prints garbage)?
        }
    }
    else
        printf("pTable (= NULL) not pointing to anything (i.e. has not been intiaialized\n");
            
    getchar();
    
    return 0;
}

result printed:
aa[0]=A0
aa[1]=A1
aa[2]=A2
aa[3]=A3
aa[4]=A4
aa[5]=A5
aa[6]=A6
aa[7]=A7
aa[8]=A8
aa[9]=A9
aa[10]=A10
aa[11]=A11
aa[12]=A12
aa[13]=A13
aa[14]=A14
aa[15]=A15
aa[16]=A16
aa[17]=A17
aa[18]=A18
aa[19]=A19
No. TT W * H = Area AA
========================
[ 0] T0 0 0 0 H?ÎhO
XhH?Îh?
[ 1] T1 1 1 1 H?ÎhO
XhH?Îh?
[ 2] T2 2 2 4 H?ÎhO
XhH?Îh?
[ 3] T3 3 3 9 H?ÎhO
XhH?Îh?
[ 4] T4 4 4 16 H?ÎhO
XhH?Îh?
[ 5] T5 5 5 25 H?ÎhO
XhH?Îh?
[ 6] T6 6 6 36 H?ÎhO
XhH?Îh?
[ 7] T7 7 7 49 H?ÎhO
XhH?Îh?
[ 8] T8 8 8 64 H?ÎhO
XhH?Îh?
[ 9] T9 9 9 81 H?ÎhO
XhH?Îh?
[10] T10 10 10 100 H?ÎhO
XhH?Îh?
[11] T11 11 11 121 H?ÎhO
XhH?Îh?
[12] T12 12 12 144 H?ÎhO
XhH?Îh?
[13] T13 13 13 169 H?ÎhO
XhH?Îh?
[14] T14 14 14 196 H?ÎhO
XhH?Îh?
[15] T15 15 15 225 H?ÎhO
XhH?Îh?
[16] T16 16 16 256 H?ÎhO
XhH?Îh?
[17] T17 17 17 289 H?ÎhO
XhH?Îh?
[18] T18 18 18 324 H?ÎhO
XhH?Îh?
[19] T19 19 19 361 H?ÎhO
XhH?Îh?

Salem, thx for your response.
So are you saying I cannot use a char pointer as a member inside a structure (i.e. it would have to be a string...like char name[10] instead of char* name)?