[Warning] It not the completed code. its just a rough idea
do{
printf("Please enter a number :")
scanf("%d", &no);
if (no <=0)
printf("invalid");
}while(no<=0);Hi Guys!
I've a issue with scanf.
First loop the program. I entered '1', a valid input. Once i retry the program, i entered a value example 'abcwad'. It is confirm invalid. But the scanf will use back the first loop of the program value of '1'
any solution?
Jump to Postscnaf with %d will only accept numeric data -- anything else is ignored and scanf() does not change the value of the input parameter. Check the return value to see if scanf() successfuly converted any data.
Jump to PostGet the input data as a string, then your program can check its contents to see if it's numeric data or not. Since you are posting in the c++ forum I'd suggestion using cin and std::string, not scanf() or fgets() which are from C language.
scnaf with %d will only accept numeric data -- anything else is ignored and scanf() does not change the value of the input parameter. Check the return value to see if scanf() successfuly converted any data.
Oh. If i typed none numeric data, scanf will use back the first loop program value.. any other solution to solve this?
Get the input data as a string, then your program can check its contents to see if it's numeric data or not. Since you are posting in the c++ forum I'd suggestion using cin and std::string, not scanf() or fgets() which are from C language.
Hmm Cos im using visual C++.
Anyway, Is there any idea that i can add range for this http://www.daniweb.com/code/snippet216679.html code.
do
{
fputs("Enter an integer (0-100): ", stdout);
fflush(stdout);
} while ( !mygeti(&value) || value < 0 || value > 100 );THANKS!
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