simple ticketing machine program

I'm trying to a simple ticketing machine program. I prompt for user input in integer form because my assignment forced to be so. So i write as follow:

Code:

#include <stdio.h>

int main (void)

int departure, destination;

printf("Please enter your destination [0-10]: ");
scanf("%d",destination);

while (destination<0 || destination>10)
{
printf("Error! Please enter appropriate destination.");
printf("Please enter your destination [0-10]: ");
scanf("%d",destination);
}

Yet, problem occured when i testing the program.
If the user enter character as input, then my program will keep on non-stop poping out my "loop part".
It just would be fine when key in integer but it will error when users entering character. So, how m i going to prevent it non-stop poping out error when users entering character ???

You need to check the return value of scanf to make sure it read a number. If it didn't, you need to clear out the input stream. Read the FAQ, it covers it there.


Quzah.

Code:

printf("Please enter your destination [0-10]: ");
scanf("%d",destination);


//should have an ampersand in the scanf() line:

scanf("%d", &destination);

//now add this line to remove the newline from
// the keyboard buffer:
getchar();

You just need an ampersand before the variable name in the scanf. When you're scanning integers, or doubles or floats for that matter, you need an & before the variable name in the scanf.

Originally Posted by Adak

Code:

printf("Please enter your destination [0-10]: ");
scanf("%d",destination);


//should have an ampersand in the scanf() line:

scanf("%d", &destination);

//now add this line to remove the newline from
// the keyboard buffer:
getchar();

I'm sorry that the "&" i have forgotten to put it on the post i published yesterday. In fact i do put "&" symbol in scanf and i just missed it when published.

Code:

#include <stdio.h>

int main (void)

int departure, destination;

printf("Please enter your destination [0-10]: ");
scanf("%d",&destination);

while (destination<0 || destination>10)
{
printf("Error! Please enter appropriate destination.");
printf("Please enter your destination [0-10]: ");
scanf("%d",&destination);
}

I hope to find the solution for the problem:

The scanf i set is to read for integer input. So, when user keys in alphabet like A , N, U.... this action will cause my program occured error when running the program. How can i make my scanf can read both char (alphabet) and int (integer) whilst at the same time i just want to scanf for integer input but appear error message to users when get alphabet input ???


**I'm a beginner in C language. And too pro C language i still couldnt cope with yet.

I already told you how.

Quzah.