Code-Bin #899 - random magic

random magic
Posted by: Daniel Harrison | October 18, 2010 @ 6:39am

C Code

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

#define generate_num(min, max) ((rand() % (max - min)) + min)

enum {
      MINIMUM, MAXIMUM, VALUES
};

const char *msgs[3] = {
      "Enter the minimum value.",
      "Enter the maximum value.",
      "Enter the number of random values to generate."
};

int *numbers;

int get_max(int *, int, int);
int get_min(int *, int, int);

int main()
{
      char buffer[512];
      int range[3];
      int i;

srand(time(NULL));
      do {
            for(i = 0; i < 3; ++i) {
                  puts(msgs[i]);
                  fgets(buffer, sizeof buffer, stdin);
                  sscanf(buffer, "%d", &range[i]);
            }
      } while(range[MINIMUM] >= range[MAXIMUM]);
      numbers = malloc(sizeof (int) * range[VALUES]);
      for(i = 0; i < range[VALUES]; ++i) {
            *(numbers + i) = generate_num(range[MINIMUM], range[MAXIMUM]);
            printf("%d: %d\n", i + 1, *(numbers + i));
      }
      printf("The maximum value is: %d\nThe minimum value is: %d\n",
             get_max(numbers, range[MINIMUM], range[VALUES]),
             get_min(numbers, range[MAXIMUM], range[VALUES]));
      free(numbers);
      return 0;
}

int get_max(int *num, int minimum_value, int size)
{
      int val = minimum_value;
      int i;

for(i = 0; i < size; ++i) {
            if(val < *(num + i))
                  val = *(num + i);
      }
      return val;
}

int get_min(int *num, int maximum_value, int size)
{
      int val = maximum_value;
      int i;
    
      for(i = 0; i < size; ++i) {
            if(val > *(num + i))
                  val = *(num + i);
      }
      return val;
}

Syntax Highlighting

[Open in new window]

Author Comments

none

Rating

4.53 / 8
49 Votes