解一元二次方程，可以连续解多次

解一元二次方程.cpp

#include "iostream.h"
#include "math.h"
int main(){
	float a,b,c;
	float x1,x2,deta;
	bool conti;
	conti=true;
	while(conti){
		cout<<"ax^2 + bx + c\n";
		cout<<"Input a,b,c with Enter between them:\n";
		cin>>a;cin>>b;cin>>c;
		deta=b*b-4*a*c;
		if (deta==0){
			cout<<"Deta is 0!\nAnd x1=x2=";
			x1=(-b+sqrt(deta))/(2*a);
			cout<<x1;
		}else if (deta>0){
			cout<<"Deta > 0!\nAnd ";
			x1=(-b+sqrt(deta))/(2*a);
			x1=(-b-sqrt(deta))/(2*a);
			cout<<"x1=";cout<<x1;cout<<",x2=";cout<<x2;
		}else{
			cout<<"Deta < 0!\nAnd ";
			x1=(-b+sqrt(-deta))/(2*a);
			x1=(-b-sqrt(-deta))/(2*a);
			cout<<"x1=";cout<<x1;cout<<",x2=";cout<<x2;
		}
		cout<<"\nDo you want to continue? 1 for yes , 0 for no";
		cin>>conti;
		cout<<"\n";
	}
	return 0;
}