init

2022/day3/p1/day3p1.c

@@ -0,0 +1,83 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+/*
+A-Z : 65-90 ; - 38
+a-z : 97-122 ; - 96
+*/
+
+void PrintLine(char Line[], int Start, int End)
+{
+    for (int i = Start; i < End; i++) {
+        printf("%c", Line[i]);
+    }
+    printf("\n");
+}
+
+int main()
+{
+
+    FILE *File;
+    char *Line = malloc(256);
+    int Total = 0;
+    int Priority = 0;
+
+    File = fopen("input.txt", "r");
+
+    while (fgets(Line, 256, File) != NULL)
+    {
+
+        int Size = strlen(Line);
+        int Compartment1End = Size/2; // compartment 1 end
+
+        char Shared = ' ';
+
+
+        PrintLine(Line, 0, Compartment1End);
+        PrintLine(Line, Compartment1End, Size);
+
+
+        for (int i = 0; i < Compartment1End; i++)
+        {
+            char Current = Line[i];
+
+            for (int y = Compartment1End; y < Size; y++)
+            {
+                if (Current == Line[y])
+                {
+                    Shared = Line[y];
+                    break;
+                }
+            }
+
+            if (Shared != ' ')
+            {
+                break;
+            }
+        }
+
+
+        printf("Shared Item: %c\n", Shared);
+        printf("\n");
+
+
+        int n = (int) Shared;
+
+        if (n >= 65 && n <= 90)
+            Priority = n-38;
+
+        else if (n >= 97 && n <= 122)
+            Priority = n-96;
+
+
+        Total += Priority;
+
+    }
+
+    printf("Total priority is %d\n", Total);
+
+    fclose(File);
+
+    return 0;
+}