Homework for lab 2

Homework Lab 2/homework_lab2.c

+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+int isDate (int input);
+int largestNumber ();
+int smallestNumber ();
+int toBinary(int input);
+
+int main() {
+    
+    // Custom changable variables ----------------------------------
+    int numberToBinary = 1023;
+    int date = 29022100;
+    // End -----------------------------------------------
+    
+    printf("Homework Lab 2 (10 - September - 2018)\n");
+    printf("Largest number in array:\t%d", largestNumber());
+    printf("\nSmallest number in array:\t%d", smallestNumber());
+    printf("\nIs valid date:\t\t\t%s", isDate(date) == 1? "True" : "False");
+    printf("\nBinary Homework:\t\t%d", toBinary(numberToBinary));
+    return (EXIT_SUCCESS);
+}
+
+int largestNumber () {
+    int size = 10;
+    int numbers[] = {15, 6, 7, 98, -8, 65, 777, -87, 213, 5};
+    
+    int i;
+    int largest = numbers[0];
+    for (i = 0; i < size; i++) {
+        if (numbers[i] > largest) largest = numbers[i];
+    }
+    return largest;
+}
+
+int smallestNumber () {
+    int size = 10;
+    int numbers[] = {15, 6, 7, 98, -8, 65, 777, -87, 213, 5};
+    
+    int i;
+    int smallest = numbers[0];
+    for (i = 0; i < size; i++) {
+        if (numbers[i] < smallest) smallest = numbers[i];
+    }
+    return smallest;
+}
+
+int isDate (int input) {
+    int day = input / 1000000;
+    int month = input / 10000 % 100;
+    int year = input % 10000;
+    
+    if (year < 0) return 0;
+    if (month > 12)  return 0;
+    if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12) {
+        if (day > 31) return 0;
+    }
+    if (month == 4 || month == 6 || month == 9 || month == 11) {
+        if (day > 30) return 0;
+    }
+    if (month == 2) {
+        if (year % 4 || (year % 100 == 0 && year % 400)) {
+            if (day > 28) return 0;
+        } else {
+            if (day > 29) return 0;
+        }
+    }
+    
+    return 1;
+}
+
+int toBinary(int input) {
+    if (input > 1023) return 0; // Ran out of memory error
+    int binLength = log(input) / log(2) + 1;
+    int a[binLength];
+    
+    int i;
+    for (i = 0; i < binLength; i++) {
+        a[i] = input % 2;
+        input /= 2;
+    }
+    unsigned int result = 0;
+    for (i = 0; i < binLength; i++) {
+        result = 10 * result + a[binLength - i - 1];
+    }
+    return result;
+}