How to remove accents and tilde in a C++ std::string

Question

I have a problem with a string in C++ which has several words in Spanish. This means that I have a lot of words with accents and tildes. I want to replace them for their not

Answer 1

I could not link the ICU libraries but I still think it's the best solution. As I need this program to be functional as soon as possible I made a little program (that I have to improve) and I'm going to use that. Thank you all for for suggestions and answers.

Here's the code I'm gonna use:

for (it= dictionary.begin(); it != dictionary.end(); it++)
{
    strMine=(it->first);
    found=toReplace.find(strMine);
    while (found != std::string::npos)
    {
        strAux=(it->second);
        toReplace.erase(found,2);
        toReplace.insert(found,strAux);
        found=toReplace.find(strMine,found+1);
    }
} 

I will change it next time I have to turn my program in for correction (in about 6 weeks).