// 10.21 (Computerization of Health Records) #include <stdio.h> int ageCalculator(int, int, int, int, int, int); void heartRateCalculator(int, int *, int *, int *); float bmiCalculator(int, int); typedef enum gender { MALE, FEMALE } Gender; typedef struct currentDate { int year; int day; int month; } CurrentDate; typedef struct birthday { int year; int day; int month; } Birthday; typedef struct healthProfile { // a person's basic health variables char *firstName; char *lastName; Gender sex; int height; //in inches int weight; // in pounds Birthday birthday; CurrentDate currentDate; int age; int maxHeartRate; // highest heart rate int targetHeartRateLow, targetHeartRateHigh; float BMI; } HealthProfile; int main() { HealthProfile person; person.firstName = "Ugur"; // Person's data person.lastName = "Damar"; person.sex = MALE; person.height = 74; person.weight = 220; person.birthday.year = 1995; person...