Hi folks,

Can you help me try to figure this one out?

I am trying to create a program that will accept a string from a user input ( cin) in the HH:MM:SS format, and then convert this into seconds. However, I also want to avoid "fat-fingered"input by creating an error message that disallows special characters or alphabetical input ( other than the colons I need to separate the time stamp.)

I did manage to create a workaround, where I took an HH:MM:SS input, and then set this to an input string.

I then used assignment statements to set this string to be the same value as three new string values. I called a string.erase(x,y) to remove the unwanted characters so that the three string values then represent hours, minutes and seconds. I created a function from istringstream (#include <sstream>) to convert the string into an integer and then performed the math to convert the time string into seconds for further calculations.

Can anyone think of a better way to do this? If someone enters only a single character, or they enter a special character instead of a number then my program vaporizes. I tried creating an array, but every time I use the istringstream or the atoi function I get an error message from the compiler that I can't set a const char to a char.

Thanks in advance!


8 Years
Discussion Span
Last Post by Ancient Dragon

After getting the input string you could validate the string by first checking the string length to insure it is the correct length, then enter a loop and use isdigit() to check that each character is a digit or compare with ':' for a colon. If it passes all that then you could separate the input string into individual integers then validate again for valid ranges of hours, minutes and seconds. Finally convert all to seconds.

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