15 files changed, 296 insertions(+), 82 deletions(-)

M README
D cconvert/README
A checkerboard/Makefile
A checkerboard/checkerboard.c
D dateline/README
D posneg/README
D posneg/posneg
D posneg/posneg.o
D primeornot/README
A resistors/Makefile
A resistors/resistors.c
D serialCalc/README
D taxcalc/README
A vowel_or_consonant/Makefile
A vowel_or_consonant/vowel_or_consonant.c

@@ 1,8 1,9 @@
 Simple C Programs
 =================
-By Hamblingreen
+By Bobby Hamblin
 
-This is a collection of short and sweet programs written in C. I got the prompts
-from Steve Oualline's book *Practical C Programming*. The docs are included in each folders README and in the C files themeslves. The comment boxes on the C files are
-designed to fit on the Pinephone's screen. These programs are licensed under the
-MIT License.
+This is a collection of short and sweet programs written in C. I got
+the prompts from Steve Oualline's book *Practical C Programming*. The
+docs are included in each C file. The comment boxes on the C files are
+designed to fit on the Pinephone's screen. These programs are licensed
+under the MIT License.

@@ 1,20 0,0 @@
-cConvert -- convert imperial to metric units in your terminal By hamblingreen [hamblingreen@hotmail.com](mailto:hamblingreen@hotmail.com)
-
-Purpose: Convert units of measurement from imperial to metric through the command line. To be small, fast, well-documented, and demonstrate the life cycle of a simple C program.
-
-Usage: Type in the number of units you need to convert, followed by the unit character according to the following chart:
-
-## Unit | Meaning
-
-i | Inches f | Feet y | Yards m | Miles
-
-Reference: Steve Oualline
-
-Restrictions: Only works for the units listed above. Corresponding metric unit not listed in output.
-
-Roadmap:
-
-* make decimal places configurable
-* use full names of units
-* include name of metric unit in output
-* add exit key/command like 'q' or 'quit'>
\ No newline at end of file

@@ 0,0 1,7 @@
+#
+# Makefile for the program taxCalc
+#
+# Turn on debugging
+CFLAGS=-g
+checkerboard:checkerboard.o
+	$(CC) $(CFLAGS) -o checkerboard checkerboard.o

@@ 0,0 1,39 @@
+/****************************************
+* checkerboard -- print checkerboard	*
+* Author: hamblingreen			*
+*   <hamblingreen@hotmail.com>		*
+* Purpose: demonstrate for loops	*
+* Reference: Steve Oualline		*
+****************************************/
+
+#include <stdio.h>
+
+int counter;
+int counter2;
+int counter3;
+int width = 7; /* width of checkerboard - 1 */
+int height = 7; /* width of checkerboard - 1 */
+
+int main() {
+	for (counter2 = 0; counter2 <= height; counter2++) {
+		/* Print top row */
+		for (counter = 0; counter <= width; counter++) {
+			printf("+-----");
+		}
+		printf("+\n");
+		/* Print middle */
+		for (counter3 = 0; counter3 <= 3; counter3++) {
+			for (counter = 0; counter <= width; counter++) {
+				printf("|     ");
+			}
+			printf("|\n");
+			}
+		}
+		/* Print bottom row */
+		for (counter = 0; counter <= width; counter++) {
+			printf("+-----");
+		}
+		printf("+\n");
+
+	return (0);
+}

@@ 1,9 0,0 @@
-Dateline -- Find the time between 2 different dates
-
-By hamblingreen <hamblingreen@hotmail.com> 
-
-Purpose: Find the time between 2 dates, and display that information in a command-line-interface. To be small, fast, well-documented, and demonstrate the life cycle of a simple C program.
-
-Usage: Type in the first date, followed by the second in the following format: 12 4 22 4 2 23. Enter a blank line to exit.
-
-Reference: Steve Oualline

@@ 1,12 0,0 @@
-posneg -- Calculate the number of positive and negative numbers in a
-data set
-
-By hamblingreen <hamblingreen@hotmail.com> 
-
-Purpose: Calculate the number of positive and negative numbers in a data
-set. To be small, fast, well-documented, and demonstrate the life cycle
-of a simple C program.
-
-Usage: Type in numbers seperated by spaces
-
-Reference: Steve Oualline

@@ 1,18 0,0 @@
-PrimeOrNot -- Find out whether a number is prime or not through a series of tests
-
-By hamblingreen <hamblingreen@hotmail.com> 
-
-Purpose: Find out whether a number is prime or not and display that information in a command-line interface. To be small, fast, well-documented, and demonstrate the life cycle of a simple C program.
-
-Usage: Type in number. Enter a blank line to exit.
-
-Reference: Steve Oualline
-
-code structure
-
-while loop
-prompt user input
-check for exit value
-last digit check
-sum divisible by 3 check
-

@@ 0,0 1,7 @@
+#
+# Makefile for the program taxCalc
+#
+# Turn on debugging
+CFLAGS=-g
+resistors:resistors.o
+	$(CC) $(CFLAGS) -o resistors resistors.o

@@ 0,0 1,42 @@
+/****************************************
+* resistors -- compute resistance	*
+* Purpose: compute the total resistance	*
+*   for a number of parallel resistors	*
+* Usage: input resistance in ohms at	*
+*   prompt, type 'q' to exit		*
+* Author: hamblingreen			*
+*   <hamblingreen@hotmail.com>		*
+* Purpose: demonstrate for loops	*
+* Reference: Steve Oualline		*
+****************************************/
+
+#include <stdio.h>
+
+int main() {
+	char line[10];
+	int resistor_count = 0; /* number of resistors in the network */
+	int current_resistor = 0; /* resistance of currently input resistor */
+	float total_resistance = 0; /* total resistance of all resistors in network */
+
+	while (1) {
+		printf("Input resistance in ohms (e.x. 200): ");
+		fgets(line, sizeof(line), stdin);
+		sscanf(line, "%d", &current_resistor);
+
+		if (current_resistor > total_resistance)
+			total_resistance = current_resistor;
+
+		if (current_resistor == 0) {
+			resistor_count++;
+			break;
+		} else {
+			resistor_count++;
+		}
+	}
+
+	total_resistance /= resistor_count;
+
+	printf("%g\n", total_resistance);
+
+	return (0);
+}

@@ 1,9 0,0 @@
-serialCalc -- Serial data transfer speed calculator
-
-By hamblingreen <hamblingreen@hotmail.com> 
-
-Purpose: Calculate how long data transfer through a serial cable would take. To be small, fast, well-documented, and demonstrate the life cycle of a simple C program.
-
-Usage: Type in the data size in Megabytes and, if you wish, the baud rate of your serial port (seperated by a space). If the baud rate is not specified, the Pinephone's default of 115200 will be used.
-
-Reference: Steve Oualline

@@ 1,9 0,0 @@
-TaxCalc -- Sales tax calculator
-
-By hamblingreen <hamblingreen@hotmail.com> 
-
-Purpose: Find the added cost of sales tax to a product of a particular price, and display this information in a command-line interface. To be small, fast, well-documented, and demonstrate the life cycle of a simple C program.
-
-Usage: Type in price and (optionally) desired sales tax percentage. The default sales tax percentage is 8%. Enter a blank line to exit.
-
-Reference: Steve Oualline

@@ 0,0 1,6 @@
+# Makefile for the program vowel_or_consonant
+
+# Turn on debugging
+CFLAGS=-g
+vowel_or_consonant:vowel_or_consonant.o
+	$(CC) $(CFLAGS) -o vowel_or_consonant vowel_or_consonant.o

@@ 0,0 1,189 @@
+/****************************************
+* vowel_or_consonant - check whether	*
+*   character is a consonant or vowel	*
+* Usage: Type in character at prompt	*
+****************************************/
+#include <stdio.h>
+
+int main(void) {
+	char line[2] = "0"; /* Input line */
+	char input = '0'; /* Character input */
+	int vowel = '0'; /* Vowel or not */
+
+	/* Receive user input */
+	printf("Input character (a-z, A-Z): ");
+	fgets(line, sizeof(line), stdin);
+	sscanf(line, "%c", &input);
+
+	/* Check for vowel, consonant, or non-letter */
+	switch (input) {
+		case 'a':
+			vowel = 1;
+			break;
+		case 'A':
+			vowel = 1;
+			break;
+		case 'b':
+			vowel = 0;
+			break;
+		case 'B':
+			vowel = 0;
+			break;
+		case 'c':
+			vowel = 0;
+			break;
+		case 'C':
+			vowel = 0;
+			break;
+		case 'd':
+			vowel = 0;
+			break;
+		case 'D':
+			vowel = 0;
+			break;
+		case 'e':
+			vowel = 1;
+			break;
+		case 'E':
+			vowel = 1;
+			break;
+		case 'f':
+			vowel = 0;
+			break;
+		case 'F':
+			vowel = 0;
+			break;
+		case 'g':
+			vowel = 0;
+			break;
+		case 'G':
+			vowel = 0;
+			break;
+		case 'h':
+			vowel = 0;
+			break;
+		case 'H':
+			vowel = 0;
+			break;
+		case 'i':
+			vowel = 1;
+			break;
+		case 'I':
+			vowel = 1;
+			break;
+		case 'j':
+			vowel = 0;
+			break;
+		case 'J':
+			vowel = 0;
+			break;
+		case 'k':
+			vowel = 0;
+			break;
+		case 'K':
+			vowel = 0;
+			break;
+		case 'l':
+			vowel = 0;
+			break;
+		case 'L':
+			vowel = 0;
+			break;
+		case 'm':
+			vowel = 0;
+			break;
+		case 'M':
+			vowel = 0;
+			break;
+		case 'n':
+			vowel = 0;
+			break;
+		case 'N':
+			vowel = 0;
+			break;
+		case 'o':
+			vowel = 1;
+			break;
+		case 'O':
+			vowel = 1;
+			break;
+		case 'p':
+			vowel = 0;
+			break;
+		case 'P':
+			vowel = 0;
+			break;
+		case 'q':
+			vowel = 0;
+			break;
+		case 'Q':
+			vowel = 0;
+			break;
+		case 'r':
+			vowel = 0;
+			break;
+		case 'R':
+			vowel = 0;
+			break;
+		case 's':
+			vowel = 0;
+			break;
+		case 'S':
+			vowel = 0;
+			break;
+		case 't':
+			vowel = 0;
+			break;
+		case 'T':
+			vowel = 0;
+			break;
+		case 'u':
+			vowel = 1;
+			break;
+		case 'U':
+			vowel = 1;
+			break;
+		case 'v':
+			vowel = 0;
+			break;
+		case 'V':
+			vowel = 0;
+			break;
+		case 'w':
+			vowel = 0;
+			break;
+		case 'W':
+			vowel = 0;
+			break;
+		case 'x':
+			vowel = 0;
+			break;
+		case 'X':
+			vowel = 0;
+			break;
+		case 'y':
+			printf("Y is sometimes a vowel");
+			break;
+		case 'Y':
+			printf("Y is sometimes a vowel");
+			break;
+		case 'z':
+			vowel = 0;
+			break;
+		case 'Z':
+			vowel = 0;
+			break;
+		default:
+			printf("The character input was not a letter. Try again!\n");
+			break;
+	}
+
+	/* Print result */
+	if (vowel == 0)
+		printf("Character '%c' is not a vowel", input);
+	if (vowel == 1)
+		printf("Character '%c' is a vowel", input);
+
+	return 0;
+}
+