I have been trying to create an unordered map that takes in (x, y) values as the key to look for its corresponding value.
For example) x=-1 y=0 I would get a certain symbol '$'
I have created the following unordered map:
static boost::unordered_map<pair<char, char>, char> map;
But I am having problems when I try to insert values into the map doing the following:
map.insert({ { '-1', '0' }, '$' });
It doesn't seem like I am getting a correct map.
Whenever I do the following within the lookup of the map I get this:
char temp = map[{'-1','0'}];
temp = '0'
Any help will be much appreciated,
Thank you, Al
'-1'
is a multi-character constant, with a value that's probably out of range for char
. If you mean to use the values -1
and 0
, then remove the quotes.
For portability, if the values might be negative, you should use a type that's guaranteed to be signed (like int
or signed char
). Otherwise, you might get a surprise if you change to a compiler that gives an unsigned char
.
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.