void replaceSpaces(char[] str, int trueLength) {
	int spaceCount = 0, index, i = 0;
    
	for (i = 0; i < trueLength; i++) {
		if (str[i] == ' ') {
			spaceCount++;
		}
	}

	index = trueLength + spaceCount * 2;

	if (trueLength < str.length) str[trueLength] = '\0';

	for (i = trueLength - 1; i >= 0; i--) {
		if (str[i] == ' ') {
			str[index - 1] = '0';
			str[index - 2] = '2';
			str[index - 3] = '%';
			index = index - 3;
		} 
        else {
			str[index - 1] = str[i];
			index--;
		}
	}
}