Create a program pointerTester.c to experiment with pointers. Implement the foll

Question

Create a program pointerTester.c to experiment with pointers. Implement the following steps one by one in your program:

YOU NEED TO ANSWER QUESTION

Use printf to print your answers at the end(after 12).

Declare three integer variables a, b and c. Initialize them to 0, 100 and 225, respectively.

Print the value of each variable and its address.

Add the following declaration to your code:

int *pA = &a, *pB = &b, *p;

Print the value of each pointer and the value it points to (using the pointer)

Run your program multiple times.

Does any of the values *pA, *pB or *p change?

Does any of the values pA, pB or p change?

Change the value that p points to to 50 without declaring the valuable that p points to.
Can you print the value that p points to?

Declare an array z of 10 integers and initialize its elements to 0, 1, 2, …., 9

Print the address of each element in the array using the z[i] notation

Print the address of each element in the array using the z + i notation

Print the content of the array using z + i notation

Declare a string literal x and set it to value “hello”.

Change the second character of x to upper case. What happens?

Explanation / Answer

#include <stdio.h>

int main()
{
//Declare three integer variables a, b and c. Initialize them to 0, 100 and 225, respectively.
int a,b,c;
a = 0;
b = 100;
c = 225;
  
//Print the value of each variable and its address
printf("Variable a = %d and addrress is %u ", a,&a);
printf("Variable b = %d and addrress is %u ", b,&b);
printf("Variable c = %d and addrress is %u ", c,&c);
  
//Add the following declaration to your code:
//int *pA = &a, *pB = &b, *p;
int *pA = &a, *pB = &b, *p;
  
//Print the value of each pointer and the value it points to (using the pointer)
printf("Value of pointer pA = %u and value it points to %d ", pA, *pA);
printf("Value of pointer pB = %u and value it points to %d ", pB, *pB);
// as pointer p points to nothing there it is null pointer
//printf("Value of pointer p = %u and value it points to %d ", p, *p);
  
//Run your program multiple times.
//Does any of the values *pA, *pB or *p change?
// >>>> By running program multiple times *pA *pB does not changes

//Change the value that p points to to 50 without declaring the valuable that p points to.
*p = 50;
  
//Can you print the value that p points to?
printf("Value of pointer p = %u and value it points to %d ", p, *p); // Yes, Prints the value that p points
  
//Declare an array z of 10 integers and initialize its elements to 0, 1, 2, …., 9
int z[10];
for(int i = 0 ; i < 10 ; i++)
{
z[10] = i;
}
  
//Print the value of each element in the array using the z[i] notation
for(int i = 0 ; i < 10 ; i++)
{
printf("value of z[%d] = %d ",i ,i);
z[10] = i;
}
  
//Print the address of each element in the array using the z + i notation
for(int i = 0 ; i < 10 ; i++)
{
printf("address of z[%d] = %u ",i ,z+i);
z[10] = i;
}
  
//Print the content of the array using z + i notation
for(int i = 0 ; i < 10 ; i++)
{
printf("content of z + %d = %d ",i ,*(z+i));
z[10] = i;
}
  
//Declare a string literal x and set it to value “hello”.
char *x = "hello";
  
//Change the second character of x to upper case. What happens?
printf("%c", *(x+1)-32);
  
return 0;
  
}

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