Added files from first programming course at OSU

OSU Coursework/CS 161 - Intro to Programming I/Labs/Lab 3/lab3_extended.c

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+/*
+ * Original Author: Corwin A. Perren (perrenc)
+ * File: lab3_extended.c
+ * Created: 2012 January 26, 13:42 by perrenc
+ * Last Modified: 2012 February 2, 01:31 by perrenc 
+ * 
+ * This program tries to guess a number the user has though of. 
+ * It has five tries before erroring out.
+ */	
+
+#include <stdio.h> /** included to allow for printf() to be used*/
+#include <time.h> /** included to allow time() to be used*/
+#include <stdlib.h> /** include to allow rand() and srand() to be used*/
+/** @brief main Function
+@param void This function does not accept any input variables
+@return This function would return an error code to the OS if needed.
+*/
+int main (int argc, char **argv) {
+
+	srand(time(NULL)); /* seed the number generator */
+	int x = 0; /* variable to hold our random integer */
+	int i = 0; /* variable used for user input */
+	int guesses = 0; /* used to track number of user guesses */
+	int max = 51; /* used as a ceiling for guesses */
+	int min = 0; /* used as a floor for guesses */
+
+/* Keeps randomizing x until it reaches a value under 50 */
+	x = rand()%51; /* assigns a value to x less than or equal to 50 that is random */
+	system("clear"); /* clears the screen */
+
+/* Loops through asking the user for guesses until five guesses have been made */
+	while (guesses < 5){
+
+/* Increments the number of guesses, asks the user about how close the computer is to
+ *  guessing the number, then takes the users response, narrows its guess range by 
+ *  changing upper or lower limits, then randomly guesses a new value withing that range.
+ *  After guessing right, it prints success, otherwise after five tries it prints that it
+ *  lost.
+ */ 	
+		guesses = ++guesses;
+		printf("Is your number %d? Enter 1 for too low, 2 for correct, or 3 for too high: ", x);
+		scanf("%i", &i);
+		if(i == 1){
+			min = ++x; /* adjusts guess floor */
+			if(max == min){ /* is about to guess the right value
+					and avoids dividing by zero */
+				x = min;
+				continue;
+			}
+			x = rand()%(max-min) + min; /* used to make a guess within a range */
+		}else if (i == 2){
+			printf("Yay! I guessed right!\n");
+			break;
+		}else if (i == 3){
+			max = --x; /* adjusts guess ceiling */
+			if(max == min){ /* same as previous one */
+				x = min;
+				continue;
+			}
+			x = rand()%(max-min) + min; /* used to make a guess within a 
+						       range */
+		}else if (x != (3 | 2 | 1)){ /* prints an error if uncorrect values are
+						 entered */
+			printf("You have entered an incorrect value, please try again.\n");
+			guesses -= 1;
+		}
+	}
+	if (i != 2){ /* prints that the computer lost */
+		printf("Awww, I lost.\n");
+	}	
+
+}
+