CODEWITHSUNDEEP
cioconsole-applicationstdinflush
user13863346
user13863346

Reputation: 347

Clearing stdin after 'Press ENTER to continue'?

I am attempting to let the user confirm his action by pressing the ENTER key - if any other key is pressed, the said 'action' does not occur.

However, instead of just a simple if((ch=getchar())=='\n') {...} , I actually want to clear stdin in case the user enters something like hello\n instead of letting that being read the next time I take input in my program.

The function I use to clear stdin is :

void eat()
{
    int eat; while ((eat = getchar()) != '\n' && eat != EOF);
}

However, this strategy leaves me with the user having to press ENTER twice , since it ' eats ' the newline that is supposed to make it send the input to my program (in a terminal).

What can be the simplest, most elegant solution ?

NOTE : I cannot use non-portable solutions like setting the console to send each character immediately by using the POSIX terminos.h .

Upvotes: 0

Views: 140

Answers (1)

user14215102
user14215102

Reputation:

Sounds like you want to read a line and then check whether it's empty or not? Looks like a job for fgets(..., stdin)

char mystring [100];
fgets (mystring , 100 , stdin);
if (*mystring == '\n') {//confirmed}

Upvotes: 1

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