Question4 Write code in C to do each of the following (a) Declare an integer var

Question

Question4 Write code in C to do each of the following (a) Declare an integer variable called max with initial value 0 (b) Increment the variable max (c) Declare a variable size array vector and assign a dynamically allocated [1 mark] [1 mark] space for 10 integers to it [2 marks] (d) Copy the values of a C string, name to a second C string contact. You can assume there is sufficient space in contact to hold name. [2 marks] (e) Write a single if condition that tests whether an integer x is even and greater than zero. [4 marks]

Explanation / Answer

(a) Syntax for declaring a variable is : datatype variable;

int max;

Initialize variable max to 0 : max = 0;

(b) Increment the variable max : max ++  (post- increment) or ++max  (pre-increment)

(c) Declaring variable size array : int * vector;

Allocating dynamic space for 10 integers using malloc() : vector = (int *) malloc ( 10 * sizeof(int));

(d) char name[10], char contact[10]; // declare two strings name and contact

strcpy(contact, name); // this function copies name string to contact string, include header file <string.h>

(e) int x; //declare an integer x

if (( x % 2 == 0) && (x >0))

{

printf(" x is an even interger");

}

  

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