CODEWITHSUNDEEP
ncurses
JShade01
JShade01

Reputation: 153

my ncurses noecho() doesn't work

For some reason my noecho() initialization is not working, until I give an input twice. The first time I press h, I get an 'h' char on the screen. However, next pressed keys don't appear on the screen. How can I prevent ALL input from showing?

#include <ncurses.h>

int main(){
    initscr();                      /* Start curses mode */        
    raw();                          /* prevents use of signals from ctl + c
    noecho();                       /* suppress echo */

    mvprintw(10,10,"Hello World!!");        /* Print */
    refresh();                      /* print it on real screen */

    while(true){
            char ch = getch();              /* wait for input */
            if(ch == 'q')
                    break;
            else if(ch == 'h'){
                    mvprintw(10,10,"Test");
            }
            else{
                    attroff(A_BOLD);
            }
    }

    endwin();                       /* end curses mode */
    return 0;
}

Upvotes: 0

Views: 1552

Answers (1)

Thomas Dickey
Thomas Dickey

Reputation: 54563

The comment is un-ended, making the compiler ignore noecho:

raw();                          /* prevents use of signals from ctl + c
noecho();                       /* suppress echo */

You can see this if you use gcc's warnings:

foo.c:3:5: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
foo.c: In function ‘main’:
foo.c:6:37: warning: "/*" within comment [-Wcomment]
foo.c:12:23: warning: conversion to ‘char’ from ‘int’ may alter its value [-Wconversion]

Upvotes: 1

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