?? vc0102.cpp
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//example1-2
#include <iostream.h>
double grav(double m1,double m2,double distance)
{
double g,G=6.67259e-11;
g=G*m1*m2/(distance*distance);
return g;
}
void main()
{
double g,Msun=1.987e30,Mearth=5.975e24;
g=grav(Msun,Mearth,1.495e11);
cout<<"The gravitation between sun and earth is "<<g<<"N."<<endl;
}
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