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*cptr = &channel[0] // cptr = channel;
display (*cptr); // display (cptr);
int *cptr, i; // int i;

modify this

scanf("%d", &thirdnum);
printf("\nThe three numbers entered is %.2d %.2f and %.2d\n", maxnum);

Check it!

this code is mean

+------+------+------+------+------+------+------+------+
^
p

if p->word is equal with word, p is assinged p->left or p->right

this is not remove p

#include <stdio.h>
#include <stdlib.h>

/* function main begins program execution */
int main()
{
int row; /* initialize row */
int column; /* define column */
int x;

while (fread(&X, sizeof(contact_rec), 1, fp)) != NULL) <----"Expression Syntax Error"

while (fread(&X, sizeof(contact_rec), 1, fp) != 0) //<----"Expression Syntax Error"

i suggest you

replace this

scanf("%d",&A[i][j]);
=>
scanf("%d%c",&A[i][j]);

#include <stdio.h>
#include <stdlib.h>

#define MAXNAME 40
#define MAXDIGITS 27

struct phone
{
char areacode[MAXDIGITS];
char localprefix[MAXDIGITS];