init

AcquiringLand/Fundamentals/trespass.c

@@ -0,0 +1,57 @@
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+char shift(char c, int by)
+{
+    int start = 0;
+    if(c >= 'a' && c <= 'z')
+    {
+        start = 'a';
+    }
+    else if(c >= 'A' && c <= 'Z')
+    {
+        start = 'A';
+    }
+    else return c;
+    c -= start;
+    c += by;
+    c %= 26;
+    return c + start;
+}
+
+char *reverse_shifted(char *input, int by)
+{
+    if(!input)
+    {
+        return NULL;
+    }
+    int len = strlen(input);
+    char *res = calloc(len, sizeof(char));
+    if(!res)
+    {
+        return NULL;
+    }
+    int start = 0;
+    int end = len + 1;
+    for (int i = 0; i < len; i++)
+    {
+        char val = input[end--];
+        val = shift(val, by);
+        res[start++] = val;
+    }
+    return res;
+}
+
+int main(void)
+{
+    char *test1 = "!qxsbdc k cs csrd";
+    char *res1 = reverse_shifted(test1, 42);
+    if(!res1)
+    {
+        return EXIT_FAILURE;
+    }
+    puts(res1);
+    free(res1);
+    return EXIT_SUCCESS;
+}