警告：传递'calcFx'的参数2将使指针产生整数而不进行强制转换

Question

Okay I found the true culprit of my problems, the numbers were scanning in fine for those of you that were here before this edit.

void computeDataPoints(F_SELECT *fsPtr, int n,  double points[][n])
{
  int ix;  // for indexing points, i.e. columns of 2D array
  double x; // for incrementing the value of x
  double inc;  // incrementation value of x
  inc = (fsPtr->xf - fsPtr->x0)/(n-1);
  x= fsPtr->x0;

 // Setup loop that computes the points and stores in 2D array
  for (ix=0; ix<NUM_POINTS; ix = ix + 1)
   {
      points[X_IX][ix]=x;
      points[FX_IX][ix]=calcFx(x, &fsPtr->fNumber);
      x = x+ inc;
   }
}

I have no Idea how to fix this and have done some searching, if anyone knows how to make this pass properly I'd love you forever

Answer 1

I'm just guessing here since there is really to little go on, but I think the situation is this:

You step through your code in your debugger. You stop at the call to scanf , when the debugger cursor is on the scanf line. That means the call hasn't happened yet . You need to step one more time for the scanf call to happen.

Another possibility is that you step past the scanf call, and the debugger cursor is now on the function closing } . Depending on the compiler and its generated code, that might mean that the variable sfPtr has gone out of scope and can not be examined reliably by the debugger.

The solution to both the above situation is to add another statement between the scanf call and the end of the function. For example a simple printf call to print the values:

    ...

    // Select a range of x for plotting
    printf("Select range of x for plotting (x0 and xf):");
    scanf("%lf %lf", &sfPtr->x0, &sfPtr->xf);

    // Print the values just entered
    printf("x0 = %f, xf = %f\n", sfPtr->x0, sfPtr->xf);

    // The function ends here
}

Besides printing the values, it also gives you an extra step in the debugger to check the values after the call to scanf .

Answer 2

I FOUND IT

points[FX_IX][ix]=calcFx(x, &fsPtr->fNumber);

needs to be

points[FX_IX][ix]=calcFx(x, fsPtr->fNumber);

Thank you to everyone who tried to help me when I was looking in the wrong spot