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macOS C++ Compiler for Mac? HELP with xcode?
- Thread starter oxshannon
- Start date
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lol k so i did this code up
To satisfy this question:
11 Define a function that can convert the polar coordinates into rectangular coordinates, that is input two real numbers, r and θ, and return two numbers, x and y, according to the following formula:
y = r sin theta, x = r cos theta
You must use reference parameters to return two values. Then write a program that will prompt user to input two numbers, call the function and output the results. The sample output is
Enter two numbers for polar coordinates: 3.5 20
The corresponding rectangular coordinates are (3.19531, 1.42829)
my question is.. what exactly did i do wrong? i am still pretty rough on user defined functions.. and i thought i was doing so well!!! but it doesnt work.. says use of undeclared indentifier x and y. disappointing.
Code:
#include <iostream>
using namespace std;
#include <cmath>
double polar (double &, double &);
int main ()
{
double r, angle;
cout << "Enter two numbers for polar coordinates: " << endl;
cin >> r, angle;
polar (r, angle);
cout << "The corresponding rectangular coordinates are (" << x << ", " << y << ")"
return 0;
}
double polar (double & r, double & angle)
{
double x, y;
x = r* cos (angle);
y = r * sin (angle);
return x, y;
}To satisfy this question:
11 Define a function that can convert the polar coordinates into rectangular coordinates, that is input two real numbers, r and θ, and return two numbers, x and y, according to the following formula:
y = r sin theta, x = r cos theta
You must use reference parameters to return two values. Then write a program that will prompt user to input two numbers, call the function and output the results. The sample output is
Enter two numbers for polar coordinates: 3.5 20
The corresponding rectangular coordinates are (3.19531, 1.42829)
my question is.. what exactly did i do wrong? i am still pretty rough on user defined functions.. and i thought i was doing so well!!! but it doesnt work.. says use of undeclared indentifier x and y. disappointing.
Hint. Pass by value those things you don't want/need to change in the function and pass by reference those things you do want/need to change. How many variables altogether do you need to pass to your function? What data type does it need to return?
B
B
im pretty sure it needs to return double, right? and altogether i need to pass 2 values?? im confused so im not sure..
Break the problem down.
You need to pass r and angle. Do you need to change their values? You also need to return x and y, both doubles. How might you do that if the function can only return a single value?
B
You need to pass r and angle. Do you need to change their values? You also need to return x and y, both doubles. How might you do that if the function can only return a single value?
B
r and angle are going to have to have their values changed right? why can the function only return a single value? and on top of that, HOW might i do that? lol ugh
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correct
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so am i at least on the right track here? i feel useless haha
mmm no i guess not? i dont really understand reference parameters but im tryyyying
So have we found out a program that allows a Mac to run C++, because when I get into coding I want to know if I will have to buy a PC or not. I love Macs and I hope Apple starts making them more compatible with things.
This is what I used: https://github.com/kennethreitz/osx-gcc-installer
Or you can download xcode, you definitely won't need to buy a PC.
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no not really just a comparison between pass by reference and pass by value that makes minimum sense. i dont get anything out of lecture, i learn everything in lab because my lab instructor knows what she is talking about, but sadly this assignment is due before the correspondng lab.
Thanks ill download that. and yeah I already have Xcode and I have only used it about 2 times.
If you have Xcode you already have gcc/clang and can compile C++. No need to download install anything else.
B
Code:
void give_me_a_number(int & number)
{
number = 5;
}... somewhere in deep cyberspace someone writes ...
Code:
int number_given;
give_me_a_number(number_given);
std::cout << "I was given the number: " << number_given << "\n";does anyone know if they make an ffviewer for mac yet??
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Xcode vs GCC? which one is better?
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oops and ok good. i wasn't sure if Xcode could code C++
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Xcode vs GCC? which one is better?
what are you not able to do?
the program i posted earlier (a few posts up) i thought it would work for the question i needed to do and i dont understand why it doesnt. #newbieproblems
Just gave you an example use of pass by reference and how to call it.
Test it out see what happens!
Test it out see what happens!
Xcode is an IDE, gcc is a collection of compilers (gcc = GNU compiler collection) that is used by some versions of Xcode. The newest versions of Xcode are migrating to clang instead of gcc.
B