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

int main()
{
    int lowerB;
    int upperB;
    int numCount;
    int rangeMod;
    int randOut;
    int i;
    int isGoing = 1;
    srand(time(NULL));
    printf("Random number generation: \n");
    //Return here after first if fails
    while(isGoing==1){
        printf("\nHow many numbers would you like to generate? ");
        scanf("%d",&numCount);
            if (numCount<=0){
                printf("\n\n---------------------------------------------------\nNumber must be greater than 0\n");
            }else{
                isGoing=0;
            }
    }
    isGoing=1;
    //Return here if either of the next two loops fail
    while(isGoing==1){
        printf("\nInput the lower limit of your number generation:");
        scanf("%d",&lowerB);
        printf("\nInput the upper limit of your number generation:");
        scanf("%d",&upperB);

            if (lowerB>upperB){
                printf("\n---------------------------------------------------\nYour upper limit must be larger than your lower limit.\n\n");

            }else{

                if (lowerB==upperB){
                    printf("\n---------------------------------------------------\nYour limits must be different numbers.\n\n");
                }else{
                    isGoing=0;
                    }
            }
    }
    isGoing=1;
    printf("\nYour list of random numbers:\n");
    rangeMod = 1 + upperB - lowerB;
    for(i=0;i < numCount;i++){
        randOut = rand()%rangeMod;
        printf("\n%d",randOut);
    }
    //Restart prompt
    char moreNumbers;
    while(isGoing==1){
        printf("\nDo you want to generate more numbers? Y/N:");
        scanf("%c",&moreNumbers);
        if (moreNumbers=='Y'){
                printf("\n\n\n\n---------------------------------------------------");
            main();
                }else{
                    isGoing=0;
                    }
    }
        printf("\n\n\n");
    system("pause");

    return 0;
}