How to fix "(Song Title) is not recognized in output screen"

I am writing a music program but there are some trouble here that I could not open the music file even though I have downloaded it in my pc and put my c++ program together with the music in one file.

I have tried to convert it into a wav file instead of the default file type given upon installation of the music

class Music
{
private:
int song; //song selection
public: 
void Song_Name() //function for song selection    
{
do
{
cout<<"These are the music available: "<<endl<<endl;
cout<<"1. American Teen (Khalid) "<<endl;
cout<<"2. All We Know (Chainsmokers) "<<endl;
cout<<"3. Born To Be Yours (Kygo) "<<endl;
cout<<"4. Bodak Yellow (Cardi-B) "<<endl;
cout<<"5. Bad Guy (Billie Eilish) "<<endl;
if(song==1)
{
 system("Khalid - American Teen (Official Music Video).mp3");
}
}while(isdigit(song)!=0); //repeat again if alphabet is inputted
}
};

Expected the program will open and play the downloaded song but it shows that "(Song Title) is not recognised as an internal or external command, operable program or batch file"