simple math code question

[darkchild]

This is a homework question
trying to create a program that prints out
3.0

* 5.0

------

15.00

Could you please tell me what is wrong
#include <iostream>
#include <iomanip>
using namespace std;

int main () // print to console: 3.0*5.0=15.00
{
double a;
double b;
a =(3.0);
b =(5.0);
cout << " " << fixed << setprecision (1) << a << "\n" << endl;
cout << "* " << b << "\n" << endl;
cout << "------" << endl;
cout << fixed << setprecision (2) << a*b << "\n" << endl;

return 0;
}

int calculate () // print to console: (7.1*8.3)-2.2=56.73
{
double a;
double b;
double c;
a = (7.1);
b = (8.3);
c = (2.2);
cout << " " << fixed << setprecision (1) << a << "\n" << endl;
cout << "* " << b << "\n" << endl;
cout << "- " << c << "\n" << endl;
cout << "------" << endl;
cout << setprecision(2) << (a*b)-c << "\n" << endl;
return (a*b)-c;
}

int calculation () // print to console: 3.2/(6.1*5.0)=0.10
{
double a;
double b;
double c;
a=(3.2);
b=(6.1);
c=(5.0);
cout << " " << fixed << setprecision (1) << a << "\n" << endl;
cout << b << "*" << c << endl; //how can I use variables instead of using quotes?
cout << "------" << endl;
cout << setprecision(2) << a/(b*c) << "\n" << endl;

system("PAUSE");

return a/(b*c);
}

[buffbill]

What problem are you having?
Also please use code tags your code

[gtkano]

#include <iostream>
using namespace std;
#include <iomanip>


int main () // print to console: 3.0*5.0=15.00
{
double a;
double b;
a =(3.0);
b =(5.0);
cout << " " << fixed << setprecision (1) << a << "\n" << endl;
cout << "* " << b << "\n" << endl;
cout << "------" << endl;
cout << fixed << setprecision (2) << a*b << "\n" << endl;
system("pause");
return 0;
}

I do not understand why you created functions "int calculate ()" and "int calculation ()" if you never use them.