help with input

[nickyeng]

what is wrong with this code:

char Invalid() {
    char ignore[1];
 
    printf("\t\tInvalid choice! Please press any key to try again.\n");
    gets(ignore);
 
    return atoi(ignore);
}
 

actually i wanted it to be wait until user press any key before return anything.

but it seems that it didn't stop after printf() is output for user to press any key, and it just return.

how it happens?
i want it to stop and wait for user to press any key, then return.
I have to write it in C language(no C++).

please help

[horace1]

the newline character which you entered on the end of your last input is probably left in the input stream (so gets() returns immediatly)- you need to remove it. try

char Invalid() {
    char ignore[1];
       cin.ignore(1000,'\n');        // extract characters up to and including \n
    printf("\t\tInvalid choice! Please press any key to try again.\n");
    gets(ignore);
 
    return atoi(ignore);
}
 

[nickyeng]

the newline character which you entered on the end of your last input is probably left in the input stream (so gets() returns immediatly)- you need to remove it. try

char Invalid() {
    char ignore[1];
       cin.ignore(1000,'\n');        // extract characters up to and including \n
    printf("\t\tInvalid choice! Please press any key to try again.\n");
    gets(ignore);
 
    return atoi(ignore);
}
 

cin is c++ syntaz rite?

i dont want cin for input stream...
can you change that line to C language based ?

[horace1]

cin is c++ syntaz rite?

i dont want cin for input stream...
can you change that line to C language based ?

sorry - tend to think in C++ all the time!
try calling gets() twice, once to remove previous input and again to wait for the newline key to be hit

char Invalid() {
    char ignore[10];
       gets(ignore);       // extract characters up to and including \n
    printf("\t\tInvalid choice! Please press any key to try again.\n");
    gets(ignore);
    return atoi(ignore);
}
 

make your ignore[] array larger than 1 in case there are a number of characters in the input stream

[nickyeng]

thanks alot horace1.
:)

nick