Format Reference in Java

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Format Reference
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The format for printw() is identical to printf(). fmt is a formatting string that defines text to be output. The string can contain text, escape characters, and replaceable parameters. fmt is followed by a list of variables that are displayed by the replaceable parameters. Refer to the entries for w, mv, and mvw elsewhere in this appendix for information on the w, mv, and mvw variations to this function. The vwprintw() functions are the NCurses versions of the vprintf() function, where varglist is a va_list (for example, a pointer) representing variable arguments. Refer to the man page for vprintf().
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Return Value
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ERR on failure, OK or any int value other than ERR on success.
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Notes
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Internally, NCurses calls the sprintf() or vsprintf() functions to do the evaluation and text formatting for printw(). The output is done through the addstr() function and therefore all the notes for addstr() also apply to printw(). A variable argument version of printw(), analogous to vsprintf(), is vw_printw(). Here is the man page format:
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int vw_printw(WINDOW *win, const char *fmt, va_list varglist);
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The older version of vw_printw() was vwprintw(). It carries the same format as vw_printw() but has been deprecated.
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Appendix A
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NCurses Library Reference
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Examples
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printw( Pleased to meet you, %s %s! ,first,last);
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Here, the statement displays on the standard screen the text Pleased to meet you followed by the strings represented by first and last.
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wprintw(test, _maxx = %d, _maxy = %d\n ,test->_maxx,test->_maxy);
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The statement displays the values of _maxx and _maxy for the window test on the window test.
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mvprintw(11,COL2, %-30s , October 19, 1993 );
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Here, the statement displays at row 11 and the column indicated by COL2, the text October 19, 1993 right-justified in a column 30 characters wide.
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Sample Program
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 #include <ncurses.h> int main(void) { int yoda = 874,ss = 65; initscr(); printw( Yoda is %d years old\n ,yoda); printw( He has collected %d years\n ,yoda-ss); printw( of Social Security. ); refresh(); getch(); endwin(); return 0; }
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Sample output:
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Yoda is 874 years old He has collected 809 years of Social Security.
Also See
2, addstr(), scanw()
Appendix A
NCurses Library Reference
putwin()
The putwin() function saves a window s data to a formatted file on disk. All window information is saved: size, text, attributes, and so forth.
Man Page Format
int putwin(WINDOW *win, FILE *filep);
Format Reference
win is the name of a WINDOW variable representing the window to save to disk. filep is a FILE pointer representing a file open for writing.
Return Value
ERR on failure, or OK (or a value other than ERR) on success.
Notes
The getwin() function is used to read a window data file previously saved to disk by putwin(). See getwin(). The file saved to disk starts with a WINDOW structure header and then contains chtype-like data for each character in the window. As saved to disk, each character in the window occupies 16 bytes.
Example
putwin(help,hfile);
The statement saves information about and contents of the window help to a file referenced by hfile.
Sample Program
1 2 3 4 5 6 7 8 9 #include <ncurses.h> #include <stdlib.h> #define FILENAME window.dat void bomb(char *message); int main(void) {
Appendix A
NCurses Library Reference
10 FILE *wfile; 11 WINDOW *win; 12 int r; 13 14 initscr(); 15 start_color(); 16 init_pair(1,COLOR_WHITE,COLOR_BLUE); 17 18 addstr( Creating new window\n ); 19 refresh(); 20 21 /* Crete the window */ 22 win = newwin(5,20,7,30); 23 if(win == NULL) 24 bomb( Unable to create window\n ); 25 wbkgd(win,COLOR_PAIR(1)); 26 mvwaddstr(win,1,2, This program was\n ); 27 mvwaddstr(win,2,5, created by\n ); 28 mvwaddstr(win,3,5, Dan Gookin\n ); ; /* put your name here */ 29 wrefresh(win); 30 getch(); 31 32 /* open the file */ 33 wfile = fopen(FILENAME, w ); 34 if( wfile==NULL) 35 bomb( Error creating file\n ); 36 37 /* write the window s data */ 38 r = putwin(win,wfile); 39 if( r == ERR) 40 addstr( Error putting window to disk\n ); 41 else 42 addstr( Window put to disk\n ); 43 fclose(wfile); 44 refresh(); 45 getch(); 46 47 endwin(); 48 return 0; 49 } 50 51 void bomb(char *message) 52 { 53 endwin(); 54 puts(message); 55 exit(1); 56 }
The sample output is shown in Figure A-10.