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int search(ifstream &in, string str) { string line; if(getline(in, line)) { if(line.find(str) != -1) { cout < < line < < endl; return 1+search(in, str);

int search(ifstream &in, string str) {

string line;

if(getline(in, line)) {

if(line.find(str) != -1) {

cout << line << endl;

return 1+search(in, str);

} else {

return search(in, str);

}

} else {

return 0;

}

}

Please explain what every line of code does

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