Lottery Program Problems - c

Question

I'm currently in progress of creating my second main C program. I've only just started to learn C and I've had a few problems, as well confusion on what to do next with this program.
The idea is to basically allow the user to enter in a desired amount of years, then the program simulates the lottery games played every week, depending on how many years they enter. Then inside the program, I want the two arrays to compare to each other and check for any numbers they both have at the same time. The lottery ticket on the user's end stays the same, which is set inside the array and of course, the random lottery numbers change every week.
The basics are done, I'm just having a few problems, as well as not knowing where to go in certain areas.
Problems:
"int weeks = year * 52" doesn't work, says the initializer element isn't constant.
When I return the get_lotto_draw, I just get a bunched up number, it's not seperated in anyway, so I'm not sure how to do that.
#include <stdio.h> //Alows input/output operations
#include <stdlib.h> //Standard utility operations
//Declaring Variables
int year;
char name[15];
char option;
int lotteryPlayer[] = {5,11,15,33,42,43};
int i;
int randomNums[49];
int *lotteryPtr = lotteryPlayer;
int *randomPtr = randomNums;
int weeks = 0;
void print_array(int *lotteryPtr);
int* get_lotto_draw(int *randomPtr);
//Main Method
int main(int argc, char *argv[])
{
start: //Start of program
printf("\n---------------------------");
printf("\nProject: Jackpot Dreams ");
printf("\n---------------------------\n");
printf("\nWhat is your First Name?:> "); //Asks them for their choice
scanf("%s", &name); //Reads the input
printf("\nHow Many Years to Sleep?:> "); //Asks them for their choice
scanf("%d", &year); //Reads the input
weeks = year * 52;
printf("\nOk %s, I will play the lottery for %d years!\n",name, year);
sleep(1500);
printf("Sweet Dreams %s, don't let the bed bugs bite", &name);
sleep(1500);
printf(". ");
sleep(1500);
printf(". ");
sleep(1500);
printf(".");
sleep(2000);
printf("%d", get_lotto_draw);
system("PAUSE");
}
//Returns an array of six random lottery numbers 1-49
int* get_lotto_draw(int *randomPtr)
{
for (i=0 ; i<weeks ; i++)
return randomNums;
}
//Print out the content of an array
void print_array(int *lotteryPtr)
{
printf("Hello");
}
//Returns number of matches between two arrays
int find_matches(int * lotteryPtr, int * randomPtr)
{
}
Update:
#include <stdio.h> //Alows input/output operations
#include <stdlib.h> //Standard utility operations
//Declaring Variables
int year;
char name[15];
char option;
int lotteryPlayer[] = {5,11,15,33,42,43};
int i;
int randomNums[49];
int *lotteryPtr = lotteryPlayer;
int *randomPtr = randomNums;
int weeks = 0;
void print_array(int *lotteryPtr);
int* get_lotto_draw(int *randomPtr);
//Main Method
int main(int argc, char *argv[])
{
start: //Start of program
printf("\n---------------------------");
printf("\nProject: Jackpot Dreams ");
printf("\n---------------------------\n");
printf("\nWhat is your First Name?:> "); //Asks them for their choice
scanf("%s", name); //Reads the input
printf("\nHow Many Years to Sleep?:> "); //Asks them for their choice
scanf("%d", &year); //Reads the input
weeks = year * 52;
printf("\nOk %s, I will play the lottery for %d years!\n",name, year);
sleep(1500);
printf("Sweet Dreams %s, don't let the bed bugs bite", &name);
sleep(1500);
printf(". ");
sleep(1500);
printf(". ");
sleep(1500);
printf(".");
sleep(2000);
printf("%d", get_lotto_draw(*randomPtr));
system("PAUSE");
}
//Returns an array of six random lottery numbers 1-49
int* get_lotto_draw(int *randomPtr)
{
for (i=0 ; i<weeks ; i++)
return randomNums;
}
//Print out the content of an array
void print_array(int *lotteryPtr)
{
printf("Hello");
}
//Returns number of matches between two arrays
int find_matches(int * lotteryPtr, int * randomPtr)
{
}

Answer 1

Borrowing mostly from the comments, there are a few problems with your code.
int weeks = year * 52; results in an error because year hasn't been initialized. Change it to int weeks = 0;, and then put weeks = year * 52 at the beginning of your main function.
You don't need the start: label at the beginning of your program, unless for some reason you want to go back there using a goto, which is usually considered bad practice.
printf("%d", get_lotto_draw); prints the address of get_lotto_draw as a decimal ("%d"), you need to make it get_lotto_draw(args) to get the return value of get_lotto_draw.
system("PAUSE"), runs the command PAUSE on the shell. I don't know if this will pause the current program, but if you don't want the program to exit, a loop will do instead.
while (1) {}
Your implementation of get_lotto_draw doesn't do what you think it does. What you are doing now is just returning randomNums, what you want to do is generate a random number between 1 and 49. To do this you should first generate a random number, and mod it by 48 and add one. This will get you a random number between 1 and 49. srand(time(NULL)); int r = rand(); will generate a random number, and r %= 48; r += 1; will mod it by 48 and add one. You can then do this for each iteration of that for loop, and create an array with the values. The array that you will return will have to be malloc'd.
int get_lotto_draw() {
srand(time(NULL));
int* rv = malloc(sizeof(int) * 6);
for (int i = 0; i < 6; i++) {
rv[i] = (rand() % 48) + 1;
}
return rv;
}
Your find_matches function is also unimplemented. Simply iterating through the arrays to find matches should suffice.
int find_matches(int* a, int* b) {
int matches = 0;
for (int i = 0; i < 6; i++) {
if (a[i] == b[i]) {
matches++;
}
}
return matches;
}
Lastly, for your print_array function, you again just need to iterate through the list of lottery numbers, and print each one.
void print_array(int* arr) {
for (int i = 0; i < 5; i++) {
printf("%d ", arr[i]);
}
printf("%d", arr[5]);
printf("\n"); // remove this if you don't want a newline at the end.
}