第1个回答 2013-08-28
#include <stdio.h>
#include <math.h>
int main (void)
{
int a;
int b;
int c;
double delta;
double x1;
double x2;
printf("请输入a:");
scanf("%f",&a);
printf("请输入b:");
scanf("%f",&b);
printf("请输入c:");
scanf("%f",&c);
delta = b*b - 4*a*c;
if (delta > 0)
{
x1 = (-b +sqrt(delta)) / (2。0*a);
x2 = (-b -sqrt(delta)) / (2.0*a);
printf ("x1 = %f, x2 = %f\n", x1 , x2);
}
else if (delta == 0)
{
x1 = (-b +sqrt(delta)) / (2.0*a);
x2 = x1;
printf ("x1 = x2 = %f\n" , x1);
}
else
{
printf("无解\n");
}
return 0;
}