通用类型转换(template)

#include<string>#include<sstream>template<class out_type,class val_type>out_type convert(const val_type &val){    stringstream ss;    ss<<val;    out_type out_val;    ss>>out_val;    return out_val;}int main(){    int x=124;    string ans=convert<string,int>(x);    cout<<ans<<endl;    return 0;}