int b(double l,double r) { double a; aint b(double l,double r){double a;a=(l+r)/2;if(a*a-6>0) b(l,a);else if(a*a-6

int b(double l,double r) { double a; aint b(double l,double r){double a;a=(l+r)/2;if(a*a-6>0) b(l,a);else if(a*a-6
int b(double l,double r) { double a; a
int b(double l,double r)
{
double a;
a=(l+r)/2;
if(a*a-6>0) b(l,a);
else if(a*a-6

int b(double l,double r) { double a; aint b(double l,double r){double a;a=(l+r)/2;if(a*a-6>0) b(l,a);else if(a*a-6
函数调用,里面括号里的是实参