how to find the length of the hypotenuse?

[elsa]

hello everyohow can we define a function hyptenuse that calculates the length of the hypotenuse of a right triangle when the other two sides are given. the function double hypotenuse(double, double); should be used to determine the length of the hypotenuse for each of the triangles shown below..

triangle side 1 side2
1 3.0 4.0
2 5.0 12.0
3 8.0 15.0

[Ganon11]

OK. Are you having trouble with this? What have you tried so far? How will you solve this?

[elsa]

i was thinking of the program for the first triangle as the following:

#include<iostream>
using std::cout;
using std::endl;
//declaration of function
double hypotenuse (double,double);
int main()
{
cout<<"the hypotenuse of the first triangle is "<<hypotenuse<<endl;
return 0;
}

double hypotenuse(double x,double y)
{
x=3.0;
y=4.0;
hypotenuse=sqrt(x*x+y*y);
return hypotenuse;
}
but it is not working..there are alot of mistakes..
what can i do..plz help me solve my problems..

[horace1]

getting there - you main errors were failing the include the maths header file and the parameters to function hypotenuse()
updated code with comments where modifications have been made

#include<iostream>
#include <cmath>       // ** added
using std::cout;
using std::endl;
 
//declaration of function
double hypotenuse (double,double);
int main()
{
cout<<"the hypotenuse of the first triangle is "<<hypotenuse(3.0, 4.0) <<endl; // ** added parameters
return 0;
}
 
double hypotenuse(double x,double y)
{
//x=3.0; ** not required
//y=4.0;
double hypotenuse=sqrt(x*x+y*y);  //** added double
return hypotenuse;
}
 

[elsa]

thx alot sir..ur tips helped me alot..