song = minim.loadFile("hello.mp3") + minim.loadFile(a+".mp3");`
Assumng your strings are character arrays and not String objects, loo up the sprintf() or strcat() functions.I would also recommens that you read something formal if you want to get into programming. You would never try to learn a language like Russian by just reading "War and Peace" and hoping for the best.
char* b;char* a;strcat(b,a);
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