C++ 提取特定符号中的字符串

#define _CRT_SECURE_NO_WARNINGS
#include 
std::string characterSegmentation(std::string source);
int main()
{



    std::cout << characterSegmentation("Youth is not a time of life; it is a state of mind; it is not a matter (of rosy cheeks, red lips and supple knees; it is a matter of the will ni hao)");
    
}

std::string characterSegmentation(std::string source) {
    int len = source.size();
    char buf[1024];
    char buf1[1024]={0};
    //提取括号中的字符串
    char tar1[10] = {"("};
    char tar2[10] = {")"};
    sprintf(buf ,"%s", source.c_str());
    int ib = 0;
    for (int i = 0; i < len; i++)
    {
        if ( buf[i] == tar1[0]) {

            for (int ii = i; i < len; i++)
            {
                if (buf[i + 1] == tar2[0])
                {
                    break;
                }
                if (buf[i + 1] != tar1[0])
                {
                    buf1[ib] = buf[i + 1];
                    ib++;
                }
                
            }
            
        }
    }
    //返回提取的字符串
    return buf1;

}