Created
January 16, 2019 19:07
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| #include<stdio.h> | |
| #define HOUR 3600 | |
| #define MINUTE 60 | |
| #if defined(WIN32) || defined(_WIN32) || defined(__WIN32) && !defined(__CYGWIN__) | |
| #define IS_WINDOWS 1 | |
| #else | |
| #define IS_WINDOWS 0 | |
| #endif | |
| void scanf_int(char *q, int *n); | |
| int shutdown(int h, int m, int s); | |
| int calculate_seconds(int h, int m, int s); | |
| int main() { | |
| int h = 0; | |
| int m = 0; | |
| int s = 0; | |
| printf("Simple Shutdown Timer for Windows.\n"); | |
| printf("Written by: Joshua Paylaga\n\n"); | |
| scanf_int("Hour(s): ", &h); | |
| scanf_int("Minute(s): ", &m); | |
| scanf_int("Seconds(s): ", &s); | |
| if ((h >= 0) && (m >= 0 && m < 60) && (s >= 0 && s < 60)) { | |
| if (shutdown(h, m, s) == 1) { | |
| printf("\nYour computer will shutdown in %d:%d:%d.\n\n", h, m, s); | |
| system("pause"); | |
| } | |
| else { | |
| printf("\nThis program is intended only for Windows Machine.\n\n"); | |
| } | |
| } | |
| else { | |
| printf("\nInvalid time provided.\n\n"); | |
| } | |
| return 0; | |
| } | |
| /** | |
| * Accepts input from user and prevent run-time breakage | |
| * due to NULL input or wrong data type input. | |
| */ | |
| void scanf_int(char *q, int *n) { | |
| printf("%s", q); | |
| char buf[40]; | |
| while (fgets(buf, sizeof buf, stdin) != NULL) { | |
| if (sscanf(buf, "%d", n) != 1) { | |
| printf("%s", q); | |
| } | |
| else { | |
| break; | |
| } | |
| } | |
| } | |
| /** | |
| * Shuts down your computer within the time given. | |
| * It utilizes the windows command shutdown /s /f /t {seconds} | |
| * to initialize shutdown. This will not work if compiled to | |
| * other operating systems. | |
| */ | |
| int shutdown(int h, int m, int s) { | |
| int success = 0; | |
| if (IS_WINDOWS == 1) { | |
| int seconds = calculate_seconds(h, m, s); | |
| char command[250]; | |
| sprintf(command, "shutdown /s /f /t %d", seconds); | |
| system(command); | |
| success = 1; | |
| } | |
| else { | |
| int seconds = calculate_seconds(h, m, s); | |
| char command[250]; | |
| sprintf(command, "shutdown +h %d", seconds); | |
| system(command); | |
| success = 1; | |
| } | |
| return success; | |
| } | |
| /** | |
| * Converts h:m:s time to seconds. | |
| */ | |
| int calculate_seconds(int h, int m, int s) { | |
| int h_to_s = HOUR * h; | |
| int m_to_s = MINUTE * m; | |
| return (h_to_s + m_to_s + s); | |
| } |
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