Added work from my other class repositories before deletion

OSU Coursework/CS 344 - Operating Systems I/Assignment 4 - OTP/keygen.c

@@ -0,0 +1,51 @@
+/* 
+ * File:   keygen.c
+ * Author: Corwin Perren
+ *
+ * Created on November 29, 2016, 7:27 PM
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+#define PROGRAM_SUCCESS 0
+#define PROGRAM_FAILURE 1
+
+#define ASCII_START 65
+
+int main(int argc, char** argv) {
+    //Some error handling for bad inputs
+    if(argc < 2){
+        fprintf(stderr, "No arguments entered. Please try again.\n");
+        exit(PROGRAM_FAILURE);
+    }else if (argc > 2){
+        fprintf(stderr, "Extra arguments entered. Ignoring all but the "
+                        "first.\n");
+    }else if(atoi(argv[1]) <= 0){
+        fprintf(stderr, "Key length too small. Number must be greater than "
+                        "zero.\n");
+        exit(PROGRAM_FAILURE);
+    }
+    
+    time_t t;
+    srand((unsigned) time(&t));
+    
+    //Get the number passed in as an argument
+    int key_length = atoi(argv[1]);
+    
+    //Loop through and output a new character based on the number generated
+    for(int i = 0 ; i < key_length ; i++){
+        int rand_char = rand() % 27;
+        if(rand_char == 26){
+            printf(" ");
+        }else{
+            printf("%c", (char)(rand_char + ASCII_START));
+        }
+    }
+    
+    //Print the final newline and exit successfully.
+    printf("\n");
+    exit(PROGRAM_SUCCESS);
+}
+