How to convert a string into integers (in MIPS)

[Rat_Rodz]

Hey,

I'm working on a project for my Computer Organization class and I have to read in 2 separate times (in military format with no ":" ) as strings and then find and print the time difference. I am able to read in and save the strings no problem, but I don't have a clue as to how I can manipulate them into integers. any suggestions? ...I would post the code that I have already, but I'm not sure as to how to go about it.

 

[chiro]

Hey,

I'm working on a project for my Computer Organization class and I have to read in 2 separate times (in military format with no ":" ) as strings and then find and print the time difference. I am able to read in and save the strings no problem, but I don't have a clue as to how I can manipulate them into integers. any suggestions? ...I would post the code that I have already, but I'm not sure as to how to go about it.

Hey Rat_Rodz and welcome to the forums.

The first thing to do is to make sure that the string is valid. For the moment let's assume that the string is required to be only in base 10 (ie only have characters '0' to '9').

So assuming we string has the correct format, the rest is pretty easy.

Going from end of string to start of string we start off with our temp variable to be zero.
For each character we do temp = temp + 10^(counter) * 'value of digit'.

The digit will be calculated by using the relationship 'value of digit' = 'char value' - '0'. counter will increment in a natural loop from 0 to string_len-1.