Pointers - General Questions

What will be the output of the program?

#include <stdio.h>

int main(void) {
    int x = 7, *p = &x, **pp = &p;
    **pp += 3;
    printf("%d\n", x);
    return 0;
}

What will be the output of the program?

#include <stdio.h>

int main(void) {
    int arr[] = {10, 20, 30};
    int *p = arr;
    printf("%d %d\n", *(p + 1), p[2]);
    return 0;
}

What will be the output of the program?

#include <stdio.h>

int main(void) {
    int a = 10;
    int *p = &a;
    *p = 20;
    printf("%d\n", a);
    return 0;
}

What will be the output of the program?

#include <stdio.h>

int main(void) {
    char s[] = "hello";
    char *p = s;
    p++;
    printf("%c %s\n", *p, p);
    return 0;
}

What will be the output of the program?

#include <stdio.h>

int main(void) {
    int a[3] = {1, 2, 3};
    int sum = 0, *p;
    for (p = a; p < a + 3; p++) sum += *p;
    printf("%d\n", sum);
    return 0;
}