Use your preferred compiler to investigate the programming exercises below. This laboratory concerns programs  for the manipulation  of arrays. You will  also  familiarise  yourself with pointers.

What is wrong with this declaration of a string? (You may try printing it to see what happens)

#include <stdio.h>

int main(){

char name[] = {‘F’,’a’,’n’,’t’,’a’,’s’,’t’,’i’,’c’};

printf("%s \n", name);

}

What is returned by the following code:

#include <stdio.h>

int main(){

char *adr = “hello” ;

int i;

for(i=0; i<3; i++)

putchar(adr[i]);

printf("\n");

i=0;

while(adr[i])

putchar(adr[i++]);

}

Write an appropriate declaration for each of the following variables:

1.   digits - an array of 10 integers

2.   rates – an array of 6 floats

What will the following program print if you enter the number 9 from the keyboard when requested?

Compile and run the program to see if you were right.

Write the values of variables index and month after each of the last two statements is executed

#include <stdio.h>

main()

{

constint days[] = {31,28,31,30,31,30,31,31,30,31,30,31};

printf("Enter month\n");

scanf("%d",&month);

index = --month;

printf( "Month %2d has %d days\n", ++month, days[index]);

}

Declare an array of six integers and initialise it to the values 1, 2, 4, 8, 16, and 32.

Declare an array of 100 integers and initialise the last element with – 1. Don’t worry about the other elements.

Write a program that declares and initialises an array of five floats and then copies the contents of the array into another array (Remember,the second array should also be declared before you can use it). Next compute the average of the set of five values. Use the array elements to compute the average not the numbers.

The program should print the five values stored in the second array on one line separated by commas and spaces, and the average value, as follows:

Example output:

1.34, 2.83, 17.82, 127.12, 0.12

The average is: 29.846

Consider the following two-dimensional array declared as follows:

float t[3][4];

Write a program that initialises the array t using values of your choice and calculates the sum of the values of its elements.