如何避免使用getchar()按Enter在下一個代碼中：#include <stdio.h>int main(void) {
int c;
while ((c=getchar())!= EOF)
putchar(c);
return 0;}我得按下進入打印我輸入的所有信件getchar，但我不想這樣做，我想做的是按下這封信，立即看到我介紹的信沒有按下就重復了一遍進入..例如，如果我按下字母‘a’，我想看到它旁邊的另一個‘a’，依此類推：aabbccddeeff.....但是當我按“a”沒有發(fā)生任何事情時，我可以寫其他信件，只有當我按下時才會顯示副本。進入:abcdef
abcdef我該怎么做？我正在使用命令cc -o example example.c在Ubuntu下編譯。
3 回答
慕尼黑5688855
TA貢獻1848條經驗 獲得超2個贊
stty
#include<stdio.h>int main(void){
int c;
/* use system call to make terminal send all keystrokes directly to stdin */
system ("/bin/stty raw");
while((c=getchar())!= '.') {
/* type a period to break out of the loop, since CTRL-D won't work raw */
putchar(c);
}
/* use system call to set terminal behaviour to more normal behaviour */
system ("/bin/stty cooked");
return 0;}stty cooked
man stty
PIPIONE
TA貢獻1829條經驗 獲得超9個贊
'\n'EOF
#include<stdio.h>#include <termios.h> //termios, TCSANOW, ECHO, ICANON#include <unistd.h>
//STDIN_FILENOint main(void){
int c;
static struct termios oldt, newt;
/*tcgetattr gets the parameters of the current terminal
STDIN_FILENO will tell tcgetattr that it should write the settings
of stdin to oldt*/
tcgetattr( STDIN_FILENO, &oldt);
/*now the settings will be copied*/
newt = oldt;
/*ICANON normally takes care that one line at a time will be processed
that means it will return if it sees a "\n" or an EOF or an EOL*/
newt.c_lflag &= ~(ICANON);
/*Those new settings will be set to STDIN
TCSANOW tells tcsetattr to change attributes immediately. */
tcsetattr( STDIN_FILENO, TCSANOW, &newt);
/*This is your part:
I choose 'e' to end input. Notice that EOF is also turned off
in the non-canonical mode*/
while((c=getchar())!= 'e')
putchar(c);
/*restore the old settings*/
tcsetattr( STDIN_FILENO, TCSANOW, &oldt);
return 0;}putchar()
newt.c_lflag &= ~(ICANON | ECHO);
臨摹微笑
TA貢獻1982條經驗 獲得超2個贊
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