a006. 一元二次方程式 | From: [36.231.115.35] | 發表日期 : 2014-09-27 21:28

#include <stdio.h>

#include <math.h>

int main(){

int a;

int b;

int c;

int D;

int x1;

int x2;

int x;

while(scanf("%d %d %d",&a,&b,&c)!=EOF){

D=b*b-4*a*c;

if (D>0){

x1=(-b+sqrt(D))/(2*a);

x2=(-b-sqrt(D))/(2*a);

printf("Two different roots x1=%d , x2=%d\n ", x1,x2);

}

else if(D==0){

x=-b/(2*a);

printf("Two same roots x=%d\n",x); 

}

else if(D<0){

printf("No real root\n");

}

}

return 0;

}