KPlanisphere / ncurses-projects

Practica 2 - Sistemas Operativos

Ncurses Projects in C

Description

This project contains a series of C programs that utilize the ncurses library to create text-based user interfaces. These programs demonstrate various features of ncurses such as window management, color manipulation, and handling user input. Each file showcases different aspects of ncurses programming, providing a comprehensive overview of its capabilities.

Key Features

• Ncurses Initialization: Examples of initializing ncurses, setting up windows, and ending ncurses mode.
• Color Handling: Demonstrations of initializing color pairs and applying them to text and backgrounds.
• User Input: Handling user input, including masked input for password fields.
• Window Management: Creating and managing multiple windows within the terminal screen.

Files

1. A1P2.c

   • Demonstrates basic ncurses setup and text display.
   • Key Code Snippet:

     #include <ncurses.h>
     
     int main() {
         initscr();
         move(10, 12);
         printw("Hola linux");
         refresh();
         getch();
         endwin();
         return 0;
     }

     This code initializes ncurses, moves the cursor to a specified position, prints a message, waits for user input, and then ends ncurses mode.

2. A2P2.c

   • Illustrates the use of colors and text attributes in ncurses.
   • Key Code Snippet:

     #include <stdlib.h>
     #include <ncurses.h>
     #include <errno.h>
     #include <unistd.h>
     
     int main() {
         initscr();
         start_color();
         init_pair(1, COLOR_BLUE, COLOR_YELLOW);
         init_pair(2, COLOR_RED, COLOR_YELLOW);
         bkgd(COLOR_PAIR(2));
         attron(COLOR_PAIR(1) | A_UNDERLINE);
         move(10, 40);
         attron(A_REVERSE);
         printw("HOLA MUNDO");
         getch();
         endwin();
         exit(0);
     }

     This code initializes ncurses, sets up color pairs, applies text attributes, and displays a message with reversed and underlined text.

3. A3P2.c

   • Focuses on window management, user input handling, and masked input for passwords.
   • Key Code Snippet:

     #include <stdlib.h>
     #include <ncurses.h>
     #include <errno.h>
     #include <unistd.h>
     
     int main() {
         int c, i = 0;
         int xmax, ymax;
         char cadena[80];
         WINDOW *punt_ven;
     
         initscr();
         getmaxyx(stdscr, ymax, xmax);
         if (has_colors())
             start_color();
         init_pair(1, COLOR_RED, COLOR_GREEN);
         attron(COLOR_PAIR(1));
         punt_ven = subwin(stdscr, 3, 40, 8, 20);
         box(punt_ven, ACS_VLINE, ACS_HLINE);
         mvwaddstr(punt_ven, 1, 1, "Contraseña: ");
         noecho();
     
         while ((c = getch()) != '\n' && i < 80) {
             cadena[i++] = c;
             waddch(punt_ven, '*');
             wrefresh(punt_ven);
         }
     
         echo();
         cadena[i] = '\0';
         mvwprintw(punt_ven, 1, 1, "El Password es %s\n", cadena);
         wrefresh(punt_ven);
         sleep(3);
         delwin(punt_ven);
         endwin();
         return 0;
     }

     This code demonstrates creating a subwindow, handling user input with masking for passwords, and displaying the entered password after input is complete.

How to Use

1. Compilation: Each C file can be compiled using a C compiler such as gcc.

   gcc A1P2.c -o A1P2 -lncurses

2. Execution: Run the compiled programs to see the output of the ncurses operations.

   ./A1P2