how to convert"-123" pointer string to int -123 without using atoi

thyagi

a function which takes a string (pointer to char) as a parameter and returns the
integer equivalent.str2int("1658") would return the value 1658
To improve your program change the function to accept strings with a leading minus sign toi ndicate a negative number.
One last improvement might be to print a warning if the string represents a numberthat is outside the range of an int.

gpraghuram

Quote:

Originally Posted by thyagi

a function which takes a string (pointer to char) as a parameter and returns the
integer equivalent.str2int("1658") would return the value 1658
To improve your program change the function to accept strings with a leading minus sign toi ndicate a negative number.
One last improvement might be to print a warning if the string represents a numberthat is outside the range of an int.

I think you have to write your own atoi function.
You may get atoi code easily by searching in the net.
Post again if your requirement is different.
Raghuram

Cucumber

I never liked atoi, is it standard?

I always used sscanf().

manjuks

Code removed per posting guidelines
Hope this will help you.

Thanks,
Manjunath

weaknessforcats

Why all this complex code???

The requirment was that atoi() couldn't be used. So why not just call strol() and call it a day???

how to convert"-123" pointer string to int -123 without using atoi

re: how to convert"-123" pointer string to int -123 without using atoi

re: how to convert"-123" pointer string to int -123 without using atoi

re: how to convert"-123" pointer string to int -123 without using atoi

re: how to convert"-123" pointer string to int -123 without using atoi

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