a006. 一元二次方程式 | From: [114.33.95.21] | 發表日期 : 2015-05-23 19:17

#include <stdio.h>

#include <math.h>

int main(void)

{

int a, b, c, t, s, r1, r2, i;

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

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

if(t<0)

printf("No real root\n");

else if(t==0)

printf("Two same roots x=%d\n",-b/(2*a));

else{

s = sqrt(t);

r1 = (-b+s)/(2*a);

r2 = (-b-s)/(2*a);

}

printf("Two different roots x1=%d , x2=%d\n",r1,r2);

} 

return 0;

}