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Validate data in C++


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#1
Hello_Moto

Hello_Moto

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Hey guys,

I'm still new to C++ but got a wee challenge to do. A simple program that has a wee database in it. But, now I'm trying to get it so that when a user types in data, if it is less than or greater than 5 chars and then return is pressed it gives an error message and the option to retype it in. What's the best way about going about this ? I've been trying for a couple of hours now and I'm totally stuck ! :tazz:

Thanks

H_M
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#2
baroon

baroon

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As you know in C++ string are the sequence of characters with terminating null character. Read the data as string and count character till you find null. That's all, if its not of 5 characters, then reject input.

OR

you could use library function " size_t strlen(const char *str); " defined in header file strings.h to find the length of string.
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