CODEWITHSUNDEEP
c++functionsqrt
user2002228
user2002228

Reputation: 11

C++ Sqrt function

when i compile my program it doesnt seem to execute my formula i cant figure what i am doing wrong help would be appreciated 

int main ()
  {
int distance, Xvalue, Yvalue;
double x1,y1,x2,y2;

cout << "\n Please enter X1 value: ";
cin  >> x1;
cout << " Please enter X2 value: ";
cin  >> x2;
cout << "\n Please enter Y1 value: ";
cin  >> y1;
cout << " Please enter Y2 value: ";
cin  >> y2;
    Xvalue = (x1 - x2);
    Yvalue = (y1 - y2);
distance = sqrt(Xvalue * Xvalue + Yvalue * Yvalue);

cout << "This is the distance between the two points" <<distance<< 


   cout << endl << endl;
   system ("pause");
  return 0;
 }

Upvotes: 1

Views: 1567

Answers (6)

Igor Taruffi
Igor Taruffi

Reputation: 9

include

include

int main(void)

{ float x1, x2, y1, y2, Distance;

printf("value of x2: "); scanf("%f",&x2);

printf("value of x1: "); scanf("%f",&x1);

printf("value of y2: "); scanf("%f",&y2);

printf("value of y1: "); scanf("%f",&y1);

Distance = sqrt(pow((x2-x1),2)+pow((y2-y1),2)); printf("The distance between (X2,X1) and (Y2,Y1) is %f", Distance);

return 0;

}

Upvotes: -1

Igor Taruffi
Igor Taruffi

Reputation: 9

Distance = sqrt(pow((x2-x1),2)+pow((y2-y1),2));

Upvotes: 1

CoffeDeveloper
CoffeDeveloper

Reputation: 8317

first cout input values so you can be sure if the problem is not in the input

cout<<x1<<endl;
cout<<x2<<endl;
cout<<y1<<endl;
cout<<y2<<endl;

then you are trying to cout... cout!

cout<<"this is the"<< distance << cout ... // cout again, is not very good!

try

cout<< "this is the"<< distance <<endl;
cout << endl << endl;

and anyway.. unless you need those "int" for specific reason is better to have doubles. (you can still round down them later with "floor(value)")

Upvotes: 0

cppguy
cppguy

Reputation: 3713

Change distance, Xvalue and Yvalue to doubles

Upvotes: 2

sr01853
sr01853

Reputation: 6121

Difference of double variables can be a double and your Yvalue always computes to zero.

Actually, your formula itself is wrong.

Distance Formula: Given the two points (x1, y1) and (x2, y2),

the distance between these points is given by the formula:

d = sqrt((x2-x1)^2 + (y2-y1)^2)

note that u are subtracting instead of adding the squares of differences.

double x1,y1,x2,y2,distance, Xvalue, Yvalue;
Xvalue = (x1 - x2);
Yvalue = (y1 - y2);
distance = sqrt(Xvalue * Xvalue + Yvalue * Yvalue);

Upvotes: 1

user1944429
user1944429

Reputation:

I am pretty sure this might be part of your problem:

Xvalue = (x1 - x2);
Yvalue = (y1 - y1);

it probably should be:

Xvalue = (x1 - x2);
Yvalue = (y1 - y2);

Upvotes: 1

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