5 replies to this topic

[s0n1c]

Hey guys;
I having a problem with a program that I'm creating. I need the program to get the users hourly rate for a job, and if they enter a negative number, or 0 it gives them an error message. So far this what what I have:

/* Enter hourly rate */

	printf("Enter hourly rate: ");

	scanf("%f", &hourlyRate);

	/* check hourlyRate */

	while(hourlyRate > 0)

	{	

		printf("*** ERROR: hourly rate must be positive\n");

		printf("Enter hourly rate: ");

		scanf("%f", &hourlyRate);	

	}//end while

I'm wanting the program to display this error message until a positive number higher than 0 is inputted. As is, the program runs an infinite loop.

Could someone please advice me what I am doing wrong.

Thanks in Advance;
S0n1C!

[v0id]

    int hourlyRate = -1;
    
    printf("Enter hourly rate: ");
    scanf("%d", &hourlyRate);
    
    while(hourlyRate <= 0)
    {
        printf("\nHourly rate must be greater than 0!\n");
        
        printf("Enter hourly rate: ");
        scanf("%d", &hourlyRate);
    }
    
    printf("Your hourly rate is %d\n", hourlyRate);

[s0n1c]

Thanks, but this still causes an infinite loop. hourly rate is a double, because I need it to be a decimal. Is that the reason why it's not working?

[WingedPanther]

You wrote your program to only accept non-positive values.

[dargueta]

Your problem is that you wrote your program to input the number once. You need to read in the value inside the loop, otherwise it never asks for the input again, and keeps looping.

double hourlyRate = -1.0;


while(hourlyRate <= 0.0)

{

    printf("Enter hourly rate: ");

    scanf("%d",&hourlyRate);


    if(hourlyRate <= 0.0)

        printf("Invalid value. Hourly rate must be positive.\n");

}


//continue now that you have a valid value.

[s0n1c]

Hey guys;

I figured out my problem, here is the code that I used.

/* Enter hourly rate */

	printf("Enter hourly rate: ");

	scanf("%lf", &hourlyRate);

	/* check hourlyRate */

	while(hourlyRate <= 0)

	{	

			printf("*** ERROR: hourly rate must be positive\n");

			printf("Enter hourly rate: ");

			scanf("%lf", &hourlyRate);	

	}//end while

Since I am getting the user to input a floating point variable I added %lf, instead of just %f. Now the program works fine.

Thanks for the help;
S0n1C!