CODE
#include<iostream.h>
#include<math.h>
void main()
{
float a,b,c,delta,x1,x2;
cout<<"Coeficientul lui x patrat: ";
cin>>a;
cout<<"Coeficientul lui x: ";
cin>>b;
cout<<"Termenul liber: ";
cin>>c;
if(a==0&&b==0)
cout<<"Eroare!Coeficientul lui x este 0."<<endl;
else
if(a==0)
{
x1=(-c/b);
cout<<"Ecuatia de grad 1: "<<b<<"x+"<<c<<"=0"<<" are solutia: x="<<x1<<endl;
}
else
if(b==0&&(-c/a)>=0)
{
x1=(sqrt(-c/a));
cout<<"Ecuatia "<<a<<"x*x+"<<c<<"=0"<<" are solutia x="<<x1<<endl;
}
else
if(a!=0&&b!=0)
{
delta=(b*b-4*a*c);
if(delta<0)
cout<<"Ecuatia "<<a<<"x*x+"<<b<<"*x+"<<c<<"=0 nu are solutii pentru ca 'delta'<0."<<endl;
else
if(delta==0)
{
x1=(-b/2*a);
cout<<"Delta=0."<<endl;
cout<<"Ecuatia "<<a<<"x*x+"<<b<<"*x+"<<c<<"=0 are solutia: x="<<x1<<endl;
}
else
if(delta>0)
{
x1=((-b+sqrt(delta))/2*a);
x2=((-b-sqrt(delta))/2*a);
cout<<"Ecuatia "<<a<<"x*x+"<<b<<"*x+"<<c<<"=0 are solutiile: x1="<<x1<<" si x2="<<x2<<endl;
}
}
else
cout<<"Ecuatia "<<a<<"x*x+"<<c<<"=0 nu are solutii."<<endl;
}
Exemplu:
Pentru a=45; b=-69 si c=2 , in urma rularii programului se va afisa:Ecutia 45x*x+-69*x+2=0 are solutiile: x1=3045.15 si x2=59.8493
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