Question

C language program

Write a program to do the following tasks.

Generate x random integers, the values of which are in the range [2, y]. The values of x and y are decided by the user, and both no larger than 100.

Calculate and print the number of times each integer in [2, y] occurred in these x random integers. For example, suppose x=9, y=6 and the generated random integers are

4, 4, 3, 6, 4, 4, 3, 2, 6

then the result is  

2: 1

3: 2

4: 4

5: 0

6: 2

where “2: 1” means 2 occurs once, “3: 2” means 3 occurs twice and so on.

 Print the values in [2, y] in decreasing order of the number of times they occurred. If two values in [2, y] occurred the same number of times, they should be decreasingly ordered by their own values. With the above example, the result is

4, 6, 3, 2, 5

where 6 is ordered before 3 since 6 is larger than 3, although they both occurred twice.

Answer 1

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

int main()
{
int i,j, track[101] = {0}, value_x, value_y, trackedNumbers[101] = {0};
  
printf("Enter values\nx: ");
scanf("%d", &value_x);

printf("y: ");
scanf("%d", &value_y);

srand(time(NULL));
  
for(i=0;i<value_x;i++)
{
int n = (rand() % (value_y-2+1) + 2);
track[n]++;
trackedNumbers[n] = n;
}

printf("\nFrequencies\n");
for(i= 2; i<= value_x; i++)
if(track[i] >= 1)
printf("%d: %d\n", i, track[i]);
  
for(i=2; i<=value_x; i++)
for(j=i; j<=value_x; j++)
if(track[i] > 0 && track[i] <= track[j])
{
int temp = track[i];
track[i] = track[j];
track[j] = temp;

temp = trackedNumbers[i];
trackedNumbers[i] = trackedNumbers[j];
trackedNumbers[j] = temp;
}

printf("\nOrder (decreasing): ");
for(i= 2; i<= value_x; i++)
if(track[i] != 0)
printf("%d ", trackedNumbers[i]);
return 0;
}

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