C program to calculate mean and variance using functions

Write a C program to calculate mean and variance using functions.

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

  /* calculates mean and variance */
  void calculateMeanVariance() {
        float *x, mean = 0, sd, variance;
        int temp, num, i, j;

        /* get the number of entries from user */
        printf("Enter the no of entries:");
        scanf("%d", &num);
        x   = (float *)malloc(sizeof (float) * num);

        /* get n inputs from user */
        printf("Enter your inputs:\n");
        for (i = 0; i < num; i++)
                scanf("%f", &x[i]);

        /* calculate the mean */
        for (i = 0; i < num; i++)
                mean = mean + x[i];
        mean = mean / num;

        /* calculate the varianceiance*/
        for (i = 0; i < num; i++)
                variance = variance + pow((x[i] - mean) , 2);

        variance = variance / num;
        printf("Variance: %f\n", variance);
        printf("Mean: %f\n", mean);
        return;
  }

  int main() {
        calculateMeanVariance();
        return 0;
  }

  Output:

  jp@jp-VirtualBox:~/$ ./a.out
  Enter the no of entries:5
  Enter your inputs:
  10
  20
  30
  40
  50
  Variance: 200.000000
  Mean: 30.000000