Pointer
practice.

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    char *str = "hello, world\n";
    str[5] = '.';
    printf("%s\n", str);
    return 0;
}

Is the below declaration legal?

int* ((*x)())[2];

What will be the output of the following C code?

#include <stdio.h>
void main()
{
    int a[2][3] = {1, 2, 3, , 4, 5};
    int i = 0, j = 0;
    for (i = 0; i < 2; i++)
    for (j = 0; j < 3; j++)
    printf("%d", a[i][j]);
}

What will be the output of the following C code (run without any command line arguments)?

#include <stdio.h>
int main(int argc, char *argv[])
{
    while (*argv++ != NULL)
    printf("%s\n", *argv);
    return 0;
}

What will be the output of the following C code?

#include <stdio.h>
void main()
{
    char s[] = "hello";
    s++;
    printf("%c\n", *s);
}

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    int i = 11;
    int *p = &i;
    foo(&p);
    printf("%d ", *p);
}
void foo(int *const *p)
{
    int j = 10;
    *p = &j;
    printf("%d ", **p);
}

What will be the output of the following C code?

#include <stdio.h>
void main()
{
    int k = 5;
    int *p = &k;
    int **m  = &p;
    printf("%d%d%d\n", k, *p, **p);
}

What will be the output of the following C code?

#include <stdio.h>
void main()
{
    int x = 0;
    int *ptr = &5;
    printf("%p\n", ptr);
}

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    char *str = "hello, world\n";
    char *strc = "good morning\n";
    strcpy(strc, str);
    printf("%s\n", strc);
    return 0;
}

What will be the output of the following C code?

#include <stdio.h>
void main()
{
    char *s = "hello";
    char *p = s;
    printf("%c\t%c", *p, s[1]);
}

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    char **p = {"hello", "hi", "bye"};
    printf("%s", (p)[0]);
    return 0;
}

What will be the output of the following C code?

#include <stdio.h>
struct student
{
    int no;
    char name[20];
};
struct student s;
void main()
{
    s.no = 8;
    printf("%s", s.name);
}

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    int i = 0, j = 1;
    int *a[] = {&i, &j};
    printf("%d", (*a)[0]);
    return 0;
}

What will be the output of the following C code?

#include <stdio.h>
int add(int a, int b)
{
    return a + b;
}
int main()
{
    int (*fn_ptr)(int, int);
    fn_ptr = add;
    printf("The sum of two numbers is: %d", (int)fn_ptr(2, 3));
}

What will be the output of the following C code?

#include <stdio.h>
void (*(f)())(int, float);
void (*(*x)())(int, float) = f;
void ((*y)(int, float));
void foo(int i, float f);
int main()
{
    y = x();
    y(1, 2);
}
void (*(f)())(int, float)
{
    return foo;
}
void foo(int i, float f)
{
    printf("%d %f\n", i, f);
}

What substitution should be made to //-Ref such that ptr1 points to variable c in the following C code?

#include <stdio.h>
int main()
{
    int a = 1, b = 2, c = 3;
    int *ptr1 = &a;
    int **sptr = &ptr1;
    //-Ref
}

What will be the output of the following C code?

#include <stdio.h>
void foo(int*);
int main()
{
    int i = 10;
    foo((&i)++);
}
void foo(int *p)
{
    printf("%d\n", *p);
}

Which of the following declaration are illegal?

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    int ary[4] = {1, 2, 3, 4};
    printf("%d\n", *ary);
}

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    int a = 1, b = 2, c = 3;
    int *ptr1 = &a, *ptr2 = &b, *ptr3 = &c;
    int **sptr = &ptr1; //-Ref
    *sptr = ptr2;
}