ex11-06.cpp

数据结构常用算法合集

//EX11-06.cpp
#include <iostream.h>	//cout,cin
#include <conio.h>		// getch()
#include <math.h>			//sqrt
struct equation
{ float a,b,c;
  float x1,x2,r,v;		//r :real part, v:virtual part
};
void list_equ(equation);

void main()
{ equation equ;
  float judge;
  equ.r=equ.v=0;
  cout <<"a,b,c=";
  cin >> equ.a >>equ.b >> equ.c;
  judge=equ.b*equ.b-4*equ.a*equ.c;
  if (judge==0)
  equ.x1=equ.x2=-equ.b/(2*equ.a);
  if (judge>0)
  { equ.x1=(-equ.b+sqrt(judge))/(2*equ.a);
    equ.x2=(-equ.b-sqrt(judge))/(2*equ.a);
  }
  if (judge<0)
  { equ.r=-equ.b/(2*equ.a);
    equ.v=sqrt(-judge)/(2*equ.a);
  }
  list_equ(equ);
  getch();
}
void list_equ(equation equ)
{ if (equ.r!=0)
  { cout<<"x1="<<equ.r <<"+"<<equ.v<<"i\n"
        <<"x2="<<equ.r <<"-"<<equ.v<<"i\n";
  } else
  { cout << "x1="<< equ.x1 << endl
         << "x2="<< equ.x2 << endl;
  }
}