I'm totally new to C. Here's the question:
Write the function
fzero(double f(double),double x1, double x2)as we did in class and use it to find all the solutions of
sin( pi*x / (1+x^2) ) = 0.25.
Now, I don't want you to solve the this. I'd missed this lecture and only want to understand what means
double f(double);
In that context, it means that f is a function pointer to a function to that takes one double argument, and returns a double.
As an example:
void foo(double f(double))
{
double y = f(3.0); // Call function through function pointer
printf("Output = %f\n", y); // Prints "Output = 9.0000"
}
double square(double x)
{
return x*x;
}
int main(void)
{
foo(&square); // Pass the address of square()
}
Note that there are two syntaxes for function pointers:
void foo(double f(double))
void foo(double (*f)(double))
These are equivalent.
