Question

In my task I need to use a loop and get an input between 1-5, if i get any other input i need to keep iterating until i get 1-5.

Could you please tell me what am i doing wrong?

Part of my code:

int rateSelected, weeklyHours;

    printf("Enter the number corresponding to the desired pay rate or action:\n");
    printf("1) %.2lf$/hr                               2) %.2lf$/hr\n", RATE1, RATE2);
    printf("3) %.2lf$/hr                              4) %.2lf$/hr\n", RATE3, RATE4);
    printf("5) Quit\n");

    while ((scanf("%d", &rateSelected)) != EOF && rateSelected != 5)
    {
        if (rateSelected > 5 || isalpha(rateSelected) ==1){
            printf("please enter a number between 1-5:\n");
        continue;
        }

        printf("Now enter your weekly hours:\n");
        scanf("%d", &weeklyHours);
        ChoosePayRate(rateSelected, weeklyHours);
    }

tnx

Answer 1

The problem is your use of %d format specifier. When letters are entered instead of digits, scanf returns zero to indicate that nothing is read. If you would like to allow entering letters along with digits, you should either add a read of a string when scanf returns zero, or always read into a string buffer, and then use sscanf or atoi to convert the string to integer.