Thread: Lotto game in C

For our homework, we have to write a program that simulates a lottery, randomly drawing 3 balls numbered 1 through 10. The user inputs the # of drawings. What I don't get is how to show the percentage of times the number(s)drawn are 7, 1 2 & 3, or even numbers. Can anyone give me any suggestions on how to do counters to show these percentages. This code works except for doing the percentages.

Code:

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

main()
{
     unsigned int seed;
     int a=1, b=10, k;
     int rand_int(int a, int b);
     int numDraw;
	
     printf("Enter number of Lottery Drawings to simulate:  ");
     scanf("%i", &numDraw);

     printf("\nEnter a positive integer seed value: ");
     scanf("%u",&seed);
     srand(seed);

     while (numDraw > 0)
     {
          for (k=1; k<=3; k++)
          {
                printf("%i  ",rand_int(a,b));
          }
          printf("\n");
          numDraw--;
     }
return 0;
}
   
int rand_int (int a, int b)
{
     return rand()%(b-a+1) + a;
}