Skip to content

Instantly share code, notes, and snippets.

@oott123
Created October 25, 2012 14:19
Show Gist options
  • Save oott123/3952802 to your computer and use it in GitHub Desktop.
Save oott123/3952802 to your computer and use it in GitHub Desktop.
解一元二次方程,可以连续解多次
#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;
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment