C program codes

We want to build a door lock based on voice authorization using gender classification. Which means the lock will open whether the speaker is male or female depends on place. The C program should be written then it will be used in Arduino Mega. The user will speak in microphone then the voice will be processed in Arduino and finally the decision will be displayed in LCD. To distinguish between male and female, IQR (Interquile range) method should be used in program. Also the program should be able to record the speaker voice then calculate the IQR and finally makes decision. I attached the block diagram to understand more about the project.