习题3 3.4

#include <stdio.h>#include <math.h>void main(){       float a,b,c,delt,x1,x2;       printf("输入方程的三个系数:");       scanf("%f%f%f",&a,&b,&c);       delt = b*b-4*a*c;       x1 = (-b+sqrt(delt))/(2*a);       x2 = (-b-sqrt(delt))/(2*a);       printf("方程的解分别为：x1=%f x2=%f \n",x1,x2);    }

当a=1,b=0,c=0时运行结果如下: