Initializing Array Elements Accessing the Elements Looping through an Array, to access an individual element in the array, the index number follows the variable name in square brackets. The variable can then be treated like any other variable in C.

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Accessing the Elements

To access an individual element in the array, the index number follows the variable name in square brackets. The variable can then be treated like any other variable in C. The following example assigns a value to the first element in the array.

x[0] = 16;

The following example prints the value of the third element in an array.

printf("%d\n", x[2]);

The following example uses the scanf function to read a value from the keyboard into the last element of an array with ten elements.

scanf("%d", &x[9]);

Initializing Array Elements

Arrays can be initialized like any other variables by assignment. As an array contains more than one value, the individual values are placed in curly braces, and separated with commas. The following example initializes a ten dimensional array with the first ten values of the three times table.

int x[10] = {3, 6, 9, 12, 15, 18, 21, 24, 27, 30};

This saves assigning the values individually as in the following example.

int x[10];
x[0] = 3;
x[1] = 6;
x[2] = 9;
x[3] = 12;
x[4] = 15;
x[5] = 18;
x[6] = 21;
x[7] = 24;
x[8] = 27;
x[9] = 30;

Looping through an Array

As the array is indexed sequentially, we can use the for loop to display all the values of an array. The following example displays all the values of an array:

#include <stdio.h>
int main()
{
int x[10];
int counter;

/* Randomise the random number generator */
srand((unsigned)time(NULL));

/* Assign random values to the variable */
for (counter=0; counter<10; counter++)

x[counter] = rand();

/* Display the contents of the array */
for (counter=0; counter<10; counter++)

printf("element %d has the value %d\n", counter, x[counter]);

return 0;
}

though the output will print the different values every time, result will be displayed something like this:

element 0 has the value 17132
element 1 has the value 24904
element 2 has the value 13466
element 3 has the value 3147
element 4 has the value 22006
element 5 has the value 10397
element 6 has the value 28114
element 7 has the value 19817
element 8 has the value 27430
element 9 has the value 22136

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Data Recovery with & without Programming


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