解题思路:
注意事项:
参考代码:
void fun1(float a,float b,float c)
{
float x1,x2;
float des=b*b-4*a*c;
x1=(-b+sqrt(des)/(2*a));
x2=(-b-sqrt(des)/(2*a));
printf("x1=%.3f x2=%.3f",x1,x2);
}
void fun2(float a,float b)
{
float x1,x2;
x1=(-b/(2*a));
x2=x1;
printf("x1=%.3f x2=%.3f",x1,x2);
}
void fun3(float a,float b,float c)
{
float x1,x2;
float des=sqrt(-(b*b-4*a*c))/(2*a);
x1=(-b/(2*a));
x2=x1;
printf("x1=%.3f+%.3fi x2=%.3f-%.3fi",x1,des,x2,des);
}
#include<stdio.h>
#include<math.h>
int main()
{
float a,b,c;
scanf("%f%f%f",&a,&b,&c);
float des=b*b-4*a*c;
if(des>0)
{
fun1(a,b,c);
}
else if(des==0)
{
fun2(a,b);
}
else
{
fun3(a,b,c);
}
return 0;
}
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