在C语言中,我该如何编写一个程序来告诉我哪些按键被按下了?例如,它应该输出:
You pressed F1 key
You pressed ESC key
You released F1 key
如果例如同时按下 F1 和 q 键,则将程序结束并返回 Linux 控制台。
我尝试过。
#include <curses.h> // required
int r,c, // current row and column (upper-left is (0,0))
nrows, // number of rows in window
ncols; // number of columns in window
void draw(char dc)
{ move(r,c); // curses call to move cursor to row r, column c
delch(); insch(dc); // curses calls to replace character under cursor by dc
refresh(); // curses call to update screen
r++; // go to next row
// check for need to shift right or wrap around
if (r == nrows) {
r = 0;
c++;
if (c == ncols) c = 0;
}
}
main()
{ int i; char d;
WINDOW *wnd;
wnd = initscr(); // curses call to initialize window
cbreak(); // curses call to set no waiting for Enter key
noecho(); // curses call to set no echoing
getmaxyx(wnd,nrows,ncols); // curses call to find size of window
clear(); // curses call to clear screen, send cursor to position (0,0)
refresh(); // curses call to implement all changes since last refresh
r = 0; c = 0;
while (1) {
d = getch(); // curses call to input from keyboard
if (d == 'q') break; // quit?
draw(d); // draw the character
}
endwin(); // curses call to restore the original window and leave
}
但是它存在问题,例如无法识别Shift键,valgrind指出
==11693== still reachable: 59,676 bytes in 97 blocks