Added comments.
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25
src/main.c
25
src/main.c
@ -21,26 +21,31 @@
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#include <string.h>
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#include <time.h>
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// Global version string
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char version[7] = "v0.1";
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/* Function prototypes start */
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void printCopyright();
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void printAllCopyright();
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void printWarranty();
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/* Function prototypes end */
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// Main function
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int main(int argc, char **argv) {
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if(argc < 2 || argc > 3) {
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// If inappropriate number of arguments
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if(argc < 2 || argc > 3) { // If inappropriate number of arguments (number required = 2)
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printf("Inappropriate amount of arguments.");
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printf("Usage: %s [num_trials]\n", argv[0]);
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return 1;
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}
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if(strcmp(argv[1], "-c") == 0) {
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if(strcmp(argv[1], "-c") == 0) { // If argv[1] (the second argument) is equal to "-c" ...
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printAllCopyright();
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return 0;
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} else if(strcmp(argv[1], "-w") == 0) {
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} else if(strcmp(argv[1], "-w") == 0) { // If argv[1] is equal to "-w"
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printWarranty();
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return 0;
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} else if(strcmp(argv[1], "-h") == 0 || strcmp(argv[1], "--help") == 0) {
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} else if(strcmp(argv[1], "-h") == 0 || strcmp(argv[1], "--help") == 0) { // If argv[1] is equal to "-h" or "--help"
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printf("Usage: %s [num_trials]\n\
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-c -- Print copyright info\n\
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-h | --help -- Print this help information\n\
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@ -48,9 +53,8 @@ int main(int argc, char **argv) {
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return 0;
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} else {
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int i = 0;
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while(argv[1][i] != '\0') {
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printf("%c", argv[1][i]);
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if(isdigit(argv[1][i] - '0') != 0) {
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while(argv[1][i] != '\0') { // While argv[1][i] is not equal to NULL (can't use NULL for pointers)
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if(isdigit(argv[1][i] - '0') != 0) { // if argv[1][i] is not a number between 0 and 9
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printf("You did not specify a number.\n");
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printf("Usage: %s [num_trials]\n", argv[0]);
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return 1;
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@ -65,12 +69,13 @@ int main(int argc, char **argv) {
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int heads = 0;
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int tails = 0;
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// Setup the random number generator with the seed being the time
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srand(time(NULL));
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printf("Calculating random numbers...\n");
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for(int i = 0; i < trials; i++) {
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if(i % 100000000 == 0) printf("Working...\n");
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int r = rand() % 100 + 1;
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int r = rand() % 100 + 1; // Calculate random number between 1 and 100
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if(r <= 50) heads++;
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else tails++;
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}
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@ -81,6 +86,7 @@ int main(int argc, char **argv) {
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return 0;
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}
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/* Defined functions start */
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void printCopyright() {
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printf("CoinToss %s Copyright (C) 2014 Nicolás A. Ortega\n\
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This program comes with ABSOLUTELY NO WARRANTY; for details use `-w'.\n\
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@ -106,10 +112,11 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.\n");
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void printWarranty() {
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printf(" THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY\n\
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APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT\n\
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HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM \"AS IS\" WITHOUT WARRANTY\n\
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HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM \"AS\" IS WITHOUT WARRANTY\n\
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OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,\n\
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THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR\n\
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PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM\n\
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IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF\n\
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ALL NECESSARY SERVICING, REPAIR OR CORRECTION.\n");
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}
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/* Defined functions end */
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