Kindly help!!!

[Fatima Rizwan]

hi this is Fatima..!! i have started C++ programming few days back..!!
i am given an assignment fer homewrk.In the prob i have to take the sqr root but i dun knw how to take square root.
the code is

#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int roots1,roots,a,b,c;
cout<<"Enter value of a=";
cin>>a;
cout<<"Enter value of b=";
cin>>b;
cout<<"Enter value of c=";
cin>>c;

if  (b*b- 4*a*c==0)
{
cout<<"Roots are single,equal";
}
else if (b*b-4*a*c>0)
{
cout<<"Equation has two real roots";
}
else if (b*b-4*a*c<0)
{
cout<<"Equation has two complex roots";
}
else if (b*b-4*a*c>=0)
{
roots=-b+sqrt(b*b-4*a*c)/2*a;
roots1=-b-sqrt(b*b-4*a*c)/2*a;
cout<<"The roots are"<<roots<<roots1<<endl;
}
getch();
}

in the last part if b^2-4ac is greater than and equal to zero then i have to take square root of it..and display the roots but i dun knw how to..!!

[ZuK]

You seem to use an aincent compiler.
When I use the new headers and include the math header it compiles fine.

// #include<iostream.h>
#include<iostream>  // use that instead
#include<cmath>  // for std::sqrt

using namespace std;  // reqired with the modern headers

// void main() {
int main() {  // Main returns int

    int roots1,roots,a,b,c;
    cout<<"Enter value of a=";
    cin>>a;
    cout<<"Enter value of b=";
    cin>>b;
    cout<<"Enter value of c=";
    cin>>c;
    
    if  (b*b- 4*a*c==0)
    {
        cout<<"Roots are single,equal";
    }
    else if (b*b-4*a*c>0)
    {
        cout<<"Equation has two real roots";
    }
    else if (b*b-4*a*c<0)
    {
        cout<<"Equation has two complex roots";
    }
    else if (b*b-4*a*c>=0)
    {
        roots=-b+sqrt(b*b-4*a*c)/2*a;
        roots1=-b-sqrt(b*b-4*a*c)/2*a;
        cout<<"The roots are"<<roots<<roots1<<endl;
    }
}

Kurt

[Fatima Rizwan]

thnx...then how to upgrade the compiler..???

[ZuK]

thnx...then how to upgrade the compiler..???

What are you using ?
Kurt

[R.Stiltskin]

Your code will probably compile if you simply add

#include <math.h>

[leeor_net]

If you're using Windows, get Visual Studio Express, Dev-C++ or Code::Blocks -- all are free and all use modern compilers and provide powerful IDE's and debuggers.