[impersonalis]

#include<iostream.h>
#include<conio.h>
#include<math.h>


double GetL(double v[3]){
	return sqrt(v[0]*v[0]+v[1]*v[1]+v[2]*v[2]);
}

void main(){
	double U[]={-1, 0, 1};
	double V[]={1.25, -2.8, 0.003};
	double W[]={-2, 1.333, 0};
	cout<<U[0]<<";"<<U[1]<<";"<<U[2]<<" |"<<GetL(U)<<endl;
	cout<<V[0]<<";"<<V[1]<<";"<<V[2]<<" |"<<GetL(V)<<endl;
	cout<<W[0]<<";"<<W[1]<<";"<<W[2]<<" |"<<GetL(W)<<endl;
	cout<<endl;
	getch();
}

2Magus:
не надо пугать человка, смешивая С и С++