C Programming - Memory Allocation - Discussion
Discussion Forum : Memory Allocation - Find Output of Program (Q.No. 6)
6.
Assume integer is 2 bytes wide. What will be the output of the following code?
#include<stdio.h>
#include<stdlib.h>
#define MAXROW 3
#define MAXCOL 4
int main()
{
int (*p)[MAXCOL];
p = (int (*) [MAXCOL])malloc(MAXROW *sizeof(*p));
printf("%d, %d\n", sizeof(p), sizeof(*p));
return 0;
}
Discussion:
24 comments Page 3 of 3.
Mohini said:
1 decade ago
in the program ,this
p = (int (*) [MAXCOL])malloc(MAXROW *sizeof(*p));
has no effect in the output.
this will change the value of p,but it will have not change size of p.
p = (int (*) [MAXCOL])malloc(MAXROW *sizeof(*p));
has no effect in the output.
this will change the value of p,but it will have not change size of p.
Satish Naik said:
1 decade ago
p is a pointer pointing to array of intergers of size 4
As size of integer is 2 bytes then it becomes totally 2*4=8 bytes
i.e sizeof(*p) = 8 bytes
where as
sizeof(p) = 2 bytes as p is integer as holds the address in unsigned integer form.
As size of integer is 2 bytes then it becomes totally 2*4=8 bytes
i.e sizeof(*p) = 8 bytes
where as
sizeof(p) = 2 bytes as p is integer as holds the address in unsigned integer form.
John said:
1 decade ago
It depends upon the compiler
Shrinivas said:
1 decade ago
Can any one please explain how did we get the above answer ?
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