请大神帮忙看看下面这个程序,错误地方为lx.c(8) : error C2065: 'le' : undeclared identifier。
这到底是为啥啊,我是按书里面写的,为什么是错的,请解释,谢谢#include<stdio.h>#include<math.h>intmain(){doublea,b,c,...
这到底是为啥啊,我是按书里面写的,为什么是错的,请解释,谢谢
#include<stdio.h>
#include<math.h>
int main()
{
double a,b,c,disc,x1,x2,realpart,imagpart;
scanf("%lf,%lf,%lf",&a,&b,&c);
printf("the equation:");
if(fabs(a)<=le-6)
printf("is not a quadratic\n");
else
{
disc=b*b-4*a*c;
if(fabs(disc)<=le-6)
printf("has distinct real roots:%8.4f\n",-b/(2*a));
else
if(disc>le-6)
{
x1=(-b+sqrt(disc))/(2*a);
x2=(-b-sqrt(disc))/(2*a);
printf("has distinct real roots:%8.4f and %8.4f\n",x1,x2);
}
else
{
realpart=-b/(2*a);
imagpart=sqrt(-disc)/(2*a);
printf("has complex roots:\n");
printf("%8.4f+%8.4fi\n",realpart,imagpart);
printf("%8.4f-%8.4if\n",realpart,imagpart);
}
}
return 0;
} 展开
#include<stdio.h>
#include<math.h>
int main()
{
double a,b,c,disc,x1,x2,realpart,imagpart;
scanf("%lf,%lf,%lf",&a,&b,&c);
printf("the equation:");
if(fabs(a)<=le-6)
printf("is not a quadratic\n");
else
{
disc=b*b-4*a*c;
if(fabs(disc)<=le-6)
printf("has distinct real roots:%8.4f\n",-b/(2*a));
else
if(disc>le-6)
{
x1=(-b+sqrt(disc))/(2*a);
x2=(-b-sqrt(disc))/(2*a);
printf("has distinct real roots:%8.4f and %8.4f\n",x1,x2);
}
else
{
realpart=-b/(2*a);
imagpart=sqrt(-disc)/(2*a);
printf("has complex roots:\n");
printf("%8.4f+%8.4fi\n",realpart,imagpart);
printf("%8.4f-%8.4if\n",realpart,imagpart);
}
}
return 0;
} 展开
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