std::ifstream fin("animation.txt");

std::string keyword;
int frameCount;

void skipComment(std::istream& in) {
    std::string line;
    //skip comment line
    while(in.peek() == '#')
        std::getline(in, line);
}

skipComment(fin);
fin>>keyword;
if(keyword != "animation") {
    std::cout<<"Bad animation file";
    return;
}

fin>>frameCount;
if(frameCount <= 0) {
    std::cout<<"Bad animation file";
    return;
}

skipComment(fin)
fin>>keyword;
if(keyword == "name") {
    std::getline(fin, keyword);
    // do something with the name.
}

while(fin) {
    skipComment(fin);
    fin>>keyword;
    if(keyword == "frame") {
        fin>>bound.x>>bound.y>>bound.width>>bound.height;
        bounds.push_back(bound);
    }
}