Jump to content
  • Advertisement
Sign in to follow this  
thekguy

indexing maps and strings(C++)

This topic is 3328 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts

okay, so i have an input file of two lines which i stored in 2 strings, 1 for each line. i have to multiply the letters of the string, where a = 1...z = 26, so i have a map<char, int> with all the pairs already initialized. the strings and map are all good, i output the strings and they're right and the map works fine with regular chars... yet when i index the map with chars that i in turn indexed from the string, i always get 0. so if i have a string like ABABA i expect 1*2*1*2*1 yet i get 0*0*0*0*0 the only reason i can think for this is that it didn't recognize the key i used and instead value-initialized a new int...why?

Share this post


Link to post
Share on other sites
Advertisement
In short, it's because 'a' != 'A'.

Why are you using a map<char, int>? Using regular math, 'a' - 'a' + 1 == 1 and 'z' - 'a' + 1 == 26

Share this post


Link to post
Share on other sites
Sign in to follow this  

  • Advertisement
×

Important Information

By using GameDev.net, you agree to our community Guidelines, Terms of Use, and Privacy Policy.

We are the game development community.

Whether you are an indie, hobbyist, AAA developer, or just trying to learn, GameDev.net is the place for you to learn, share, and connect with the games industry. Learn more About Us or sign up!

Sign me up!