robert2513

Hello



I am currently enrolled in a C++ class and I am working an assigment. The assignment is:



You are to write a C++ program that reads in values for m and n and prints the values of the Pythagorean triple generated by the following formulas:



side1 = m * m - n * n

side2 = 2mn

hypotenuse = m * m + n * n



Here is my code that I have written thus far:



#include <iostream>



int main()



{



int m, n, side1, side2, hypo;



cout << "This program will calculate the values of a Pythagorean triple.\n";

cout << "What is the value of side a?\n";

cin >> m;

cout << "What is the value of side b?\n";

cin >> n;



side1 = (m*m)-(n*n);

side2 = (m*n*2);

hypo = (m*m)+(n*n);



cout << "Side 1 is: "<<side1<<", Side 2 is: "<<side2<<", and the Hypotenuse is: "<<hypo<<"\n";



}



When I go to compile the code, the complier says that:

[robert@localhost ~]$ g++ pyth.cc
/usr/lib/gcc/i386-redhat-linux/3.4.2/../../../crt1.o(.text+0x18): In function `_start':
: undefined reference to `main'
collect2: ld returned 1 exit status
[robert@localhost ~]$

I'm not sure whats wrong with the program. According to the error, something is wrong with "main" but I though main was a funtion that was built into C++. Any help would be appreciated. I am programming this in geditor in Fedora Core 3.

Thanks.
Robert2513

lostcauz

I added after the include and it compiled and ran.

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bl00dninja

without the namespace declaration, C++ doesn't know where to find "cout" and "cin"

if you wish NOT to use it then declare you funtion like this:

std::cout

or

std::cin

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kurifu

I myself am not a big fan of including std namespace as it does provide a lot of namespace pollution.

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