cant return float value

[al8888]

why does it not return the float value and return true or false instead.

 #include<iostream>

using namespace std;

float myFunc(float);

float theProg();

int main(){
theProg();}

float theProg(){

float score;

float theScore;

cout << "Enter your score.\n";

cin >> score;

theScore=myFunc(score);

cout << "You scored " << theScore << endl;

}

float myFunc(float score){

if (score >101){
cout << "Out of range.\n";}
else if(score <=90 && score >=100){
return 4.0;}
else if (score <=80 && score >=89){
return 3.0;}
else if (score <=80 && score >=79){
return 2.0;}
else if (score <=60 && score >-69){
return 1.0;}
else if (score <=0 && score >= 59){
return 0;}

}

[MikeyBoy]

Look again at your if statements.

Can you tell me under what conditions score <=90 && score >=100 will ever be true?

[al8888]

sorry I'm low level dyslexic, cheers for not making fun of me :-)

[MikeyBoy]

No worries! I wasn't sure if it was just a typo, or whether you'd actually misunderstood the meanings of the operators, which is why I asked the question.

[Ganado]

Hi al8888, in addition, you also must return a value here, or otherwise account for it.

if (score >101){
    cout << "Out of range.\n";
    // error: nothing is returned!
}

Not returning a value from a function that expects to return a value invokes undefined behavior.

Perhaps have -1.0 as a return value signifying an error, or throw an exception.