mad scrolling

Hi folks,


Every time a user inputs anything other than a number in my programs it goes into a mad scroll…..is there a way to stop this….so that they would get an error message if the input was not a number

Thanks fer any help…..

>>> is there a way to stop this

Yes.


What do you mean, not helpful! My answer gives as much information as your question!!!

Well, let me just say that I ALWAYS grab input as strings! That is just my preference, and I have no problem converting numerical strings into ints, floats, etc.

That being said, you could adopt this approach and go further with the validation process.

For instance, you could write a function which validates that a string is in fact all numbers:

Code:

---

int validate(char *input)
{
int len = strlen(input);

int i;

for( i = 0; i < len; i++)
{
if(!isdigit(input[i]))
return 0;
}

return 1;
}

---

Then in main you could do:

Code:

---

int main()
{

char input[100];
int num;


do{

clrscr();

printf("Enter A Valid Number: \n\n");

fgets(input, 100, stdin);

if( !validate(input) )
continue;

break;

}while(1);

num = atoi(input);

/// rest of program...

---

Hope that helps!

Thx for the help Sebastiani.............