## C, , variance.c

``````#include <math.h>
#include <stdio.h>
#include <stdlib.h>

int main()
{
int *ARRAY = NULL, ARRAY_LENGTH, i, TEMPORARY_ELEMENT, isSorted = 0;
float MEAN = 0, VARIANCE = 0, STAND;

printf("Enter no. for Random Numbers :");
scanf("%d", &ARRAY_LENGTH);
ARRAY = (int *)realloc(
ARRAY,
ARRAY_LENGTH * (sizeof(int)));  // We allocate the dedicated memory
for (i = 0; i < ARRAY_LENGTH; i++)  // We generate the random numbers
ARRAY[i] = rand() % 100;

printf("Random Numbers Generated are :\n");  // We display them
for (i = 0; i < ARRAY_LENGTH; i++) printf("%d ", ARRAY[i]);

printf("\nSorted Data: ");  // Then we sort it using Bubble Sort..

while (!isSorted)
{                  // While our array's not sorted
isSorted = 1;  // we suppose that it's sorted
for (i = 0; i < ARRAY_LENGTH - 1; i++)
{  // then for each element of the array
if (ARRAY[i] > ARRAY[i + 1])
{                  // if the two elements aren't sorted
isSorted = 0;  // it means that the array is not sorted
TEMPORARY_ELEMENT = ARRAY[i];  // and we switch these elements
// using TEMPORARY_ELEMENT
ARRAY[i] = ARRAY[i + 1];
ARRAY[i + 1] = TEMPORARY_ELEMENT;
}
}
}
for (i = 0; i < ARRAY_LENGTH; i++)
{
printf("%d ", ARRAY[i]);
MEAN = MEAN + ARRAY[i];
}
MEAN = MEAN / (float)ARRAY_LENGTH;

for (i = 0; i < ARRAY_LENGTH; i++)
VARIANCE = VARIANCE + (pow((ARRAY[i] - MEAN), 2));

VARIANCE = VARIANCE / (float)ARRAY_LENGTH;
STAND = sqrt(VARIANCE);

printf("\n\n- Mean is: %f\n", MEAN);
printf("- Variance is: %f\n", VARIANCE);
printf("- Standard Deviation is: %f\n", STAND);
}
``````