In this article, we will discuss the differences between constant pointer, pointers to constant & constant pointers to constants. Pointers are the variables that hold… Read More
Tag Archives: Advanced Pointer
Pointers: A pointer is a variable that holds memory address of another variable. A pointer needs to be de referenced with * operator to access… Read More
Before moving forward with using const with Reference to a Pointers, let us first see what they are one by one: Pointers are used to… Read More
NULL pointer in C At the very high level, we can think of NULL as a null pointer which is used in C for various… Read More
Output of following program #include <stdio.h> int fun(int arr[]) { arr = arr+1; printf("%d ", arr[0]); } int main(void) { int arr[2] = {10, 20};… Read More
#include <stdio.h> #include <stdlib.h> int main(void) { int i; int *ptr = (int *) malloc(5 * sizeof(int)); for (i=0; i<5; i++) *(ptr +… Read More
#include <stdio.h> int main() { int a[][3] = {1, 2, 3, 4, 5, 6}; int (*ptr)[3] = a; printf("%d %d ", (*ptr)[1], (*ptr)[2]); ++ptr; printf("%d… Read More
Assume that the size of int is 4. #include <stdio.h> void f(char**); int main() { char *argv[] = { "ab", "cd", "ef", "gh", "ij", "kl"… Read More
Predict the output #include <string.h> #include <stdio.h> #include <stdlib.h> void fun(char** str_ref) { str_ref++; } int main() { char *str = (void *)malloc(100*sizeof(char));… Read More
#include <stdio.h> char *c[] = {"GeksQuiz", "MCQ", "TEST", "QUIZ"}; char **cp[] = {c+3, c+2, c+1, c}; char ***cpp = cp; int main() {… Read More
#include <stdio.h> int main() { int a[5] = {1,2,3,4,5}; int *ptr = (int*)(&a+1); printf("%d %d", *(a+1), *(ptr-1)); return 0; } (A) 2 5 (B) Garbage… Read More
Assume sizeof an integer and a pointer is 4 byte. Output? #include <stdio.h> #define R 10 #define C 20 int main() { int… Read More
C void fun(int *p) { int q = 10; p = &q; } int main() { int r = 20; int *p = &r;… Read More
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