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.str2 int("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]

a function which takes a string (pointer to char) as a parameter and returns the
integer equivalent.str2 int("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???