From eb1bade54ab97180173b07aa3da59eab64ea9b58 Mon Sep 17 00:00:00 2001
From: SinusFox <sinusfox@pm.me>
Date: Tue, 6 Jun 2023 10:29:16 +0200
Subject: [PATCH] Lottery: 6 of 49

---
 10_Lotto/10_Lotto.c | 100 ++++++++++++++++++++++++++++++++++++++++++++
 10_Lotto/10_Lotto.h |  16 +++++++
 2 files changed, 116 insertions(+)
 create mode 100644 10_Lotto/10_Lotto.c
 create mode 100644 10_Lotto/10_Lotto.h

diff --git a/10_Lotto/10_Lotto.c b/10_Lotto/10_Lotto.c
new file mode 100644
index 0000000..5c44e64
--- /dev/null
+++ b/10_Lotto/10_Lotto.c
@@ -0,0 +1,100 @@
+#include "10_Lotto.h"
+
+int main() {
+    // vars
+    int usr_input[ARRLENGTH] = {0}, ran_nums[ARRLENGTH] = {0}, amnt_correct;
+
+    // input
+    for (int i = 0; i < ARRLENGTH; i++) {
+        usr_input[i] = Input(usr_input);
+    }
+
+    // initializing number generator
+    Initialize();
+
+    // fill lottery array
+    RanArray_Fill(ran_nums);
+
+    // check for correct guesses and writes the num of correct guesses in amnt_correct
+    amnt_correct = CheckGuess(usr_input, ran_nums);
+
+    // output
+    Output(amnt_correct);
+
+    // debugging
+    for (int i = 0; i < ARRLENGTH; i++)     // output user input
+    {
+        printf("\nusr_in %i: %i", i, usr_input[i]);
+    }
+    
+    for (int i = 0; i < ARRLENGTH; i++)     // output random numbers
+    {
+        printf("\nran_num %i: %i", i, ran_nums[i]);
+    }
+    
+
+    return 0;
+}
+
+void Initialize() {
+    time_t t;
+    srand(time(&t));
+}
+
+int Input(int usr_input[]) {
+    int input;
+    while (1) {
+        printf("\nPlease type in a number: ");
+        scanf("%i", &input);                                                    // user input number
+        if (CheckNotInNums(usr_input, input) && ValidNum(input)) {
+            break;                                                              // returns num if accectable
+        }
+        printf("\nNumber is not allowed.");                                     // error: invalid number
+    }
+    return input;
+}
+
+void Output(int amnt_correct) {
+    printf("\nYou got %i numbers right!", amnt_correct);
+}
+
+int CheckGuess(int usr_in[], int ran_nums[]) {
+    int count = 0;
+    for (int i = 0; i < ARRLENGTH; i++)                         // iterating through usr_in
+    {
+        if (CheckNotInNums(ran_nums, usr_in[i]) == 0) {         // checks and counts how often each num of usr_in is in ran_nums
+            count++;
+            continue;
+        }
+    }
+    return count;                                               // returns amount of right guesses
+}
+
+void RanArray_Fill(int arr[]) {
+    int random_number;
+    for (int i = 0; i < ARRLENGTH; i++) {                   // fill array with random values from 1 to 49
+        while (1) {
+            random_number = RanNum();
+            if (CheckNotInNums(arr, random_number)) {       // check if random number doesn't exist yet
+                arr[i] = random_number;                     // if check successfull: writes random number in array
+                break;
+            }        
+        }
+    }
+}
+
+int RanNum() {
+    return (rand() % 49) + 1;       // returns random values from 1 to 49
+}
+
+int CheckNotInNums(int arr[], int num) {
+    for (int i = 0; i < ARRLENGTH; i++) {
+        if (arr[i] == num) return 0;                // returns 0 if num exists already
+    }
+    return 1;                                       // returns 1 if num doesn't exist yet
+}
+
+int ValidNum(int input) {
+    if (input > 0 && input < 50) return 1;          // returns 1 if input is between 0 and 50, thus valid
+    return 0;                                       // returns 0 if input is NOT between 0 and 50, thus invalid
+}
diff --git a/10_Lotto/10_Lotto.h b/10_Lotto/10_Lotto.h
new file mode 100644
index 0000000..c05f104
--- /dev/null
+++ b/10_Lotto/10_Lotto.h
@@ -0,0 +1,16 @@
+// includes
+#include <stdio.h>
+#include <time.h>
+
+// defines
+#define ARRLENGTH 6
+
+// function declarations
+void Initialize();
+int Input(int[]);
+void Output(int);
+int CheckGuess(int[], int[]);
+void RanArray_Fill(int[]);
+int RanNum();
+int CheckNotInNums(int[], int);
+int ValidNum(int);