noob, Compiler error: expected an expression

[preauxmetheus]

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
//global variables
//this program solicits height/weight data to calculate BMI


void main() {
    int getHeight;
}


double getHeight(int height) {
    printf("Please enter your height in inches:");
    scanf("%f", &height);
    getWeight;
} //getHeight()




double getWeight(int weight) {
    printf("Thank you. Now, please enter your weight in pounds:");
    scanf("%f", &weight);
    calculateBMI;
}


float calculateBMI(int height, double weight) {
    float calculateBMI =  double weight / height ^ 2;


}




void printBMI(float bmi) {




}


int main() {


    int height;


    height = getHeight();


    double weight;


    weight = getWeight();






    float bmi = 0;


    bmi = calculateBMI(height, weight);


    printBMI(bmi);






} //main

The error: "expected an expression"
Location: at the text that I colored red ("double"):

What gives?

[stahta01]

The way to cast is

float calculateBMI =  (double) weight / height ^ 2;

Edit: The ^ does not do what you think is does!

Tim S.