Thread: Using limits.h

I was writing this program and I need to make it print out the minimum input, the maximum input, as well as the average. I've got it to print the average, but I don't know how to use limits.h to print out the min and max inputs.

This is what I have so far....

Code:

/*
 * This program prints the smallest number, the largest number, 
 * and the average of all the numbers.
 */
#include <stdio.h>
#include <limits.h>

int main(void) {

        int input;
        int total;
        int avg;
        int count;

        total = 0;
        count = 0;

        printf("enter some numbers, and then anything else to the end:\n");

        while (scanf("%d", &input) == 1) {
                total += input;
                count = ++count;
                printf("%d\n", input);
        }
            
        avg = total/count;
          
        printf("smallest value is %d\n", INT_MIN);
        printf("largest value is %d\n", INT_MAX);
        printf("total is %d\n", total);
        printf("count is %d\n", count); 
        printf("avg is %d\n", avg);

       
}

How would I give values to INT_MIN and INT_MAX?

You can't give values to INT_MIN and INT_MAX. They are already defined as the smallest and largest storable int.

so how would i be able to print out the smallest and largest inputs?

By scanning through the array (I don't mean scanf, but searching) and keeping the lowest/highest number found.

honestly im not sure how to do that

does anyone know how i can make this happen?

Originally Posted by Matus

What array are u talking about though, i dnt see an array, prob she just wnts to use the ints and find the smallest and lowest, my mistake i see they are using one variable to find it, yea array makes sense

The OP can only average something if he keeps track of all the values to begin with. Thus he would need to utilize some sort of array.

Example:

Code:

#include <stdlib.h>
#include <stdio.h>
 
#define SCALE  0x1000
 
int main(void)
{
  size_t size = SCALE, index = 0;
  int *values, value;
 
  if(!(values = malloc(size * sizeof(*values))))
    return EXIT_FAILURE;
 
  while(scanf("%d", &value) == 1)
  {
    values[index] = value;
 
    if(++index > size)
    {
      void *tmp;
 
      size += SCALE;
      if(!(tmp = realloc(values, size * sizeof(*values))))
      {
        fputs("Oh no! There is no memory!", stderr);
        free(values);
        return EXIT_FAILURE;
      }
 
      values = tmp;
    }  
  }
 
  // Now we have a big array of values to work with.
 
  free(values);
  return EXIT_SUCCESS;
}

For auxilery help to the above code that I wrote that the OP may find useful.

Code:

/*
 * If you are using the above code I wrote
 * be sure to pass in "index" not "size"
 */
int average(int *array, size_t size)
{
  int cpy = (int)size;
  int avg = 0;

  for(;--size;array++)
    avg += *array;

  return avg / cpy; 
}

well i'm not exactly working with arrays at all, i haven't actually learned that. when i run through the code it executes and asks me for numbers. i can input as many numbers as i want, there is no limit. and from those inputs i got the while loop to add them and take the average by dividing the total by the int count. what i'm trying to do is take from the inputs, the lowest inputted number and the highest.

ohh and the printf in the while loop is just there to help me see what's going on in the loop.