Strange Compilation

I have these 3 code files in C.

My problem is that even though the function name is typed wrongly the program is still compiling.I am using GNUC.

Here are the 3 files.

The Error is Highlighted.

main.c

Code:

#include <stdio.h>
#include "functions.h"


int main() {
	int j, num;
	float radius[50], height[50];
	
	scanf("%d", &num);

	for( j = 0; j < num; j++) {
		scanf("%f%f", &radius[j], &height[j]);
	}	

	for ( j = 0; j < num; j++ ) {
		if ( testContainer(radius[j], height[j]) )
			printf("Container radius: %f, height: %f\n", radius[j], height[j]);
	}
	return 0;
}

function.c

Code:

#include <stdio.h>
#include "functions.h"

float calculateVolume(float r, float h) 
    {
	return 3.142 * r * r * h;
    }

int testContainer(float r, float h) 
  {
	if ( 500 <= calculateVolume(r, h) ) 
		return 1;
	return 0;
  }

functions.h

Code:

#ifndef FUNCTION_H
#define FUNCTION_H

float [B][COLOR=DarkRed]claculate[/COLOR][/B]Volume(float r, float h);
int testContainer(float r, float h);

#endif

My questions are ?

1)What is the Error ?
2) Is it Machine Dependent ?
3)Is it version dependent (e.g turboc,gnuc,etc.) ?

Thanking you.

 

I am still confused.Can u please provide some more help ?

 

Sure Sir.

I am not understanding even though the function prototype is not matching,why no error is reported ?

Is the "function.h" really making any significant contribution to the program except for function definition ?

 

Thank you Sir.