[Code Hoof Set Novice Village 600 Questions] Find the distance between two points in the space rectangular coordinate system

Title link:

Code Foot Collection (matiji.net)

Things to solve the problem:

The function sqrt() is examined,

You can create another variable x to store the data of x1 - x2,

This makes it easier to code the following x * x

Reference code:

#includeusing namespace std;int main( ){int x1=0,y1=0,z1=0;int x2=0,y2=0,z2=0;;/*cin >> x1 >>" ">> y1 >>" ">>z1;cin >> x2 >>" ">> y2 >>" ">>z2;*/cin >> x1 >> y1 >> z1;cin >> x2 >> y2 >> z2;double x = x1-x2;double y = y1 - y2;double z = z1 - z2;double sum = sqrt(x*x+y*y+z*z);printf("%.2lf",sum);return 0;}