Why is pinMode (tiltswitch, INPUT) producing an error? [closed] - arduino

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Ok, so I am trying to control the Pixel lights and make it so the first pixel changes color if a tilt switch tilts. I don't know why it will not let me pinMode.. It spits out the error Compilation error: expected constructor, destructor, or type conversion before '(' token
I notated below in the sketch where that error occurs. I am just starting out with Arduino, so I really don't have a full grasp and I am using existing sketches and learning as I go by adding code that I have figured out to do the things I want.
Below is my modified code to give the first 8 pixels specific colors, and change the color of Pixel 1 when the tilt switch tilts:
#include <Adafruit_NeoPixel.h> // include the Neopixel Library in this Sketch
#define PIN 6 // This is the Arduino Pin controlling the LEDstrip.
#define NUMPIXELS 8 // Here, you are informing how many LEDs you have on your strip.
// You can also control only a part of the existing LEDs, if you wish.
// This strip has 60 LEDs, so I am informing this number.
Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_RGB + NEO_KHZ800); // Here, you are specifying your strip
// The strip I am using has 50 LEDs. I want to control it in 6 groups of 1 LEDs, to make my life easier.
* So, let's define the following arrays:
*/
int PXL1[] = {0}; // array controlling the first LED. Please notice the "LED 0" is the first one, not "LED 1"
int PXL2[] = {1};
int PXL3[] = {2};
int PXL4[] = {3};
int PXL5[] = {4};
int PXL6[] = {5};
int PXL7[] = {6};
int tiltswitch = 3;
pinMode (tiltswitch, INPUT); //THIS LINE IS PRODUCING THIS ERROR: Compilation error: expected constructor, destructor, or type conversion before '(' token
void setup() {
pixels.begin(); // This initializes the NeoPixel library.
}
void loop() {
for(int i=0;i<1;i++){ // Since each array has 10 LEDs, we are going to turn them sequentially on using this index.
/*
* Notice that the lines below are just setting up the color of each pixel. This is not yet the command to turn them on. The
* pixels.setPixelColor command is a very easy way to define the color of each pixel. The syntax is:
* pixels.setPixelColor(x, pixels.Color(R,G,B)), where:
* x = the pixel you want to define a color for. In this example, we are using the arrays we created for the 6 control groups, hence the PXL1[i] input.
* R,G,B = the values of red, green, and blue on a RGB scale.
*/
// array number 1 is magenta
pixels.setPixelColor(PXL2[i], pixels.Color(255,255,0)); // array number 2 is yellow
pixels.setPixelColor(PXL3[i], pixels.Color(255,255,255)); // array number 3 is white
pixels.setPixelColor(PXL4[i], pixels.Color(0,255,0)); // array number 4 is green
pixels.setPixelColor(PXL5[i], pixels.Color(0,0,255)); // array number 5 is blue
pixels.setPixelColor(PXL6[i], pixels.Color(255,0,0)); // array number 6 is red
pixels.setPixelColor(PXL7[i], pixels.Color(10,100,200)); // array number 6 is red
pixels.show(); // Okay, we have informed which colors we want. Now, it is time to flip the switch and let the magic happen. The pixels.show() command does that
if (digitalRead(tiltswitch) == HIGH) // if the button is not pressed
pixels.setPixelColor(PXL1[i], pixels.Color(139,0,139)); // LED is purple
else // if the button is pressed
pixels.setPixelColor(PXL1[i], pixels.Color(255,255,255)); // LED is white
}
}
I was expecting the line
pinMode (tiltswitch, INPUT)
to work

Answer 1

As per the comment from jasonharper, it must be called inside a function. Move it to inside the setup() function.
Cutting your code back to the minimum required to reproduce, this causes the error:
int tiltswitch = 3;
pinMode(tiltswitch, INPUT);
void setup() {
}
while this works correctly, no error:
int tiltswitch = 3;
void setup() {
pinMode(tiltswitch, INPUT);
}