Thread: if/else if statement

i am using an if/else if statement in my code as can be seen below.

Code:

void getType()
{
char type;


printf("\nEnter wind turbine type (v or h):");
scanf("%c", &type);


if (type == 'v' || type == 'V')
{
vArea();
}
else if (type == 'h' || type == 'H')
{
hArea();
}
else 
{
printf("Invalid input!");
return getType();
}

hArea and vArea are functions that should be used if v or h is entered, however i am having problems with the invalid input section where i get a repetition in the output as seen below. if an invalid input is entered i want the function getType to run again and ask the user for another valid input.

Enter wind turbine type (v or h):k
Invalid input!
Enter wind turbine type (v or h):Invalid input!
Enter wind turbine type (v or h):


what in my code needs to be fixed so that the third line is removed and the output will then look like:

Enter wind turbine type (v or h):k
Invalid input!
Enter wind turbine type (v or h):

cheers

Originally Posted by GReaper

The moment you get invalid input you should clean the input stream of any residual characters. I usually do it with something like this:

Code:

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

Oh, and of course, you can also ignore any whitespace characters with scanf by adding a space before the %c in the format string.

cheers it fixed it!