Comparison parameter in sort STL

#1

Sir/ ma’am ,

I want to know how compare(Mycompare) parameter in sort function works as in this question i have no clue how it works.
int Mycompare(string X, string Y){

string XY = X.append(Y);
string YX = Y.append(X);
int val =  XY.compare(YX) > 0 ? 1:0 ;
if (val == 0){
    cout <<Y<<" "<<X<<" "<< YX<< "val - 0" << endl;
}

else{
    cout <<X<<" "<<Y<<" "<<XY<< "val - 1" << endl;
}

return XY.compare(YX) > 0  ? 1:0 ;

}

I tried printing the value but couldn’t understand the outputs

56454 5456454 56454val - 1

564548564 548564 564548564val - 0

54854 5454854 54854val - 1

564548564 548564 564548564val - 0

9564 5649564 9564val - 1

Input : - 54 564 548 9

#2

@sinhadivyam19
string xy is x+y
string yx is y+x
then you are comparing if xy>yx val =1 else val=0
just dry run for the input not taken two at a time.
dont forget to mark resolved and hit like if cleared :smiley:

#3

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