Changed version string.

Makefile

@@ -9,17 +9,17 @@ MKDIR=mkdir -p
 RM=rm -rf
 
 SRC_FILES := $(wildcard src/*.c)
-OBJ_FILES := $(addprefix src/, $(notdir $(SRC_FILES:.c=.o)))
+OBJ_FILES := $(addprefix obj/, $(notdir $(SRC_FILES:.c=.o)))
 
 all: $(OBJ_FILES)
 	$(MKDIR) bin
-	$(CXX) $(CXXFLAGS) $(LIBS) -o bin/cointoss src/*.o
+	$(CXX) $(CXXFLAGS) $(LIBS) -o bin/cointoss obj/*.o
 
-src/%.o: src/%.c
+obj/%.o: src/%.c
 	$(CXX) $(CXXFLAGS) $(INCLUDES) -c -o $@ $<
 
 clean:
-	$(RM) src/*.o
+	$(RM) obj/*.o
 
 cleanall: clean
 	$(RM) bin

obj/readme.txt

@@ -0,0 +1 @@
+This is where the object output files go. This readme file is a simple hack so that git registers it (git doesn't register empty directories).

src/main.c

@@ -16,28 +16,51 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <stdio.h>
+#include <ctype.h>
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
 
-char version[7] = "v0.1";
+// Global version string
+char version[7] = "v0.2";
 
+/* Function prototypes start */
 void printCopyright();
 void printAllCopyright();
 void printWarranty();
+/* Function prototypes end */
 
+// Main function:
 int main(int argc, char **argv) {
-	if(argc < 2 || argc > 3) {
+	// If inappropriate number of arguments
-		printf("Usage: %s [trials]\n", argv[0]);
+	if(argc < 2 || argc > 3) { // If inappropriate number of arguments (number required = 2)
+		printf("Inappropriate amount of arguments.");
+		printf("Usage: %s [num_trials]\n", argv[0]);
 		return 1;
 	}
 
-	if(strcmp(argv[1], "-c") == 0) {
+	if(!strcmp(argv[1], "-c")) { // If argv[1] (the second argument) is equal to "-c" ...
 		printAllCopyright();
 		return 0;
-	} else if(strcmp(argv[1], "-w") == 0) {
+	} else if(!strcmp(argv[1], "-w")) { // If argv[1] is equal to "-w"
 		printWarranty();
 		return 0;
+	} else if(!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help")) { // If argv[1] is equal to "-h" or "--help"
+		printf("Usage: %s [num_trials]\n\
+ -c		-- Print copyright info\n\
+ -h | --help	-- Print this help information\n\
+ -w		-- Print warranty information\n", argv[0]);
+		return 0;
+	} else {
+		int i = 0;
+		while(argv[1][i] != '\0') { // While argv[1][i] is not equal to NULL (can't use NULL for pointers)
+			if(isdigit(argv[1][i] - '0') != 0) { // if argv[1][i] is not a number between 0 and 9
+				printf("You did not specify a number.\n");
+				printf("Usage: %s [num_trials]\n", argv[0]);
+				return 1;
+			}
+			i++;
+		}
 	}
 
 	printCopyright();
@@ -46,12 +69,13 @@ int main(int argc, char **argv) {
 	int heads = 0;
 	int tails = 0;
 
+	// Setup the random number generator with the seed being the time
 	srand(time(NULL));
 
-	printf("Working...\n");
+	printf("Calculating random numbers...\n");
 	for(int i = 0; i < trials; i++) {
 		if(i % 100000000 == 0) printf("Working...\n");
-		int r = rand() % 100 + 1;
+		int r = rand() % 100 + 1; // Calculate random number between 1 and 100
 		if(r <= 50) heads++;
 		else tails++;
 	}
@@ -62,6 +86,7 @@ int main(int argc, char **argv) {
 	return 0;
 }
 
+/* Defined functions start */
 void printCopyright() {
 	printf("CoinToss %s Copyright (C) 2014  Nicolás A. Ortega\n\
 This program comes with ABSOLUTELY NO WARRANTY; for details use `-w'.\n\
@@ -94,3 +119,4 @@ PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM\n\
 IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF\n\
 ALL NECESSARY SERVICING, REPAIR OR CORRECTION.\n");
 }
+/* Defined functions end */