Charles Tritt / Mbed 2 deprecated PatientStructure

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Dependencies:   mbed

Fork of test_patient_structure by MSOE EE2905

patients.h@0:c435f76658b2, 2017-11-02 (annotated)

Committer:
rossatmsoe
Date:
Thu Nov 02 18:31:39 2017 +0000
Revision:
0:c435f76658b2
Child:
1:060801821b1c
Demonstration of the use of structures in C.  Inspiration to learn object-oriented programming for a more elegant solution.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rossatmsoe 0:c435f76658b2 1 // Some functions use the serial monitor so define it here.
rossatmsoe 0:c435f76658b2 2 Serial pc(USBTX,USBRX);
rossatmsoe 0:c435f76658b2 3
rossatmsoe 0:c435f76658b2 4 // The patient_record structure stores name and vitals for a patient.
rossatmsoe 0:c435f76658b2 5 struct patient_record {
rossatmsoe 0:c435f76658b2 6 char firstname[30];
rossatmsoe 0:c435f76658b2 7 char lastname[30];
rossatmsoe 0:c435f76658b2 8 int systolic;
rossatmsoe 0:c435f76658b2 9 int diastolic;
rossatmsoe 0:c435f76658b2 10 float spO2;
rossatmsoe 0:c435f76658b2 11 };
rossatmsoe 0:c435f76658b2 12
rossatmsoe 0:c435f76658b2 13 // It is assumed that we will have an array of these patient records.
rossatmsoe 0:c435f76658b2 14 // We define the maximum number of patients that we will support.
rossatmsoe 0:c435f76658b2 15 #define MAX_PATIENTS 100
rossatmsoe 0:c435f76658b2 16
rossatmsoe 0:c435f76658b2 17 //Print the values in the structure for a particular patient.
rossatmsoe 0:c435f76658b2 18 void print_patient_record(struct patient_record *first_patient, int N) {
rossatmsoe 0:c435f76658b2 19 pc.printf("%s %s \t ID: %d\n",first_patient[N].firstname, first_patient[N].lastname,N);
rossatmsoe 0:c435f76658b2 20 pc.printf("BP: %d/%d SpO2: %f\n",first_patient[N].systolic, first_patient[N].diastolic, first_patient[N].spO2);
rossatmsoe 0:c435f76658b2 21 }
rossatmsoe 0:c435f76658b2 22
rossatmsoe 0:c435f76658b2 23 //Put patient into record.
rossatmsoe 0:c435f76658b2 24 void newPatient(struct patient_record *patient, char *first, char*last)
rossatmsoe 0:c435f76658b2 25 {
rossatmsoe 0:c435f76658b2 26 // We can't just set the firstname pointer equal to the
rossatmsoe 0:c435f76658b2 27 // first pointer; that doesn't actually move the information into
rossatmsoe 0:c435f76658b2 28 // the structure. We need to copy each letter of the patient's name
rossatmsoe 0:c435f76658b2 29 // into the structure. strcpy does this.
rossatmsoe 0:c435f76658b2 30 strcpy(patient->firstname, first);
rossatmsoe 0:c435f76658b2 31 strcpy(patient->lastname,last);
rossatmsoe 0:c435f76658b2 32 }
rossatmsoe 0:c435f76658b2 33
rossatmsoe 0:c435f76658b2 34 //Fill in vital signs directly. Note that we use -> when we have a
rossatmsoe 0:c435f76658b2 35 //pointer to a struct and we want to access one of the members.
rossatmsoe 0:c435f76658b2 36 void recordBP(struct patient_record *patient, int sys, int dias, float o2) {
rossatmsoe 0:c435f76658b2 37 patient->systolic=sys;
rossatmsoe 0:c435f76658b2 38 patient->diastolic=dias;
rossatmsoe 0:c435f76658b2 39 patient->spO2 = o2;
rossatmsoe 0:c435f76658b2 40 }
rossatmsoe 0:c435f76658b2 41
rossatmsoe 0:c435f76658b2 42 //Fill in vital signs through the serial monitor (for BP) and the oxygen sensor,
rossatmsoe 0:c435f76658b2 43 //assumed to be an analog input giving the SpO2 level as a fraction.
rossatmsoe 0:c435f76658b2 44 void recordBPinteractive(struct patient_record *first_patient, AnalogIn oxygen) {
rossatmsoe 0:c435f76658b2 45 int N;
rossatmsoe 0:c435f76658b2 46 int s;
rossatmsoe 0:c435f76658b2 47 int d;
rossatmsoe 0:c435f76658b2 48
rossatmsoe 0:c435f76658b2 49 pc.printf("Enter the patient number:\n");
rossatmsoe 0:c435f76658b2 50 pc.scanf("%d",&N);
rossatmsoe 0:c435f76658b2 51 pc.printf("Enter the systolic BP:\n");
rossatmsoe 0:c435f76658b2 52 pc.scanf("%d",&s);
rossatmsoe 0:c435f76658b2 53 pc.printf("Enter the diastolic BP:\n");
rossatmsoe 0:c435f76658b2 54 pc.scanf("%d",&d);
rossatmsoe 0:c435f76658b2 55
rossatmsoe 0:c435f76658b2 56 //Note that [N] turns first_patient into a struct rather than a
rossatmsoe 0:c435f76658b2 57 //pointer to a struct (dereferences the pointer). Therefore, we
rossatmsoe 0:c435f76658b2 58 //use . to access members.
rossatmsoe 0:c435f76658b2 59 first_patient[N].systolic=s;
rossatmsoe 0:c435f76658b2 60 first_patient[N].diastolic=d;
rossatmsoe 0:c435f76658b2 61 first_patient[N].spO2=oxygen;
rossatmsoe 0:c435f76658b2 62
rossatmsoe 0:c435f76658b2 63 //Print information to confirm
rossatmsoe 0:c435f76658b2 64 pc.printf("Data entered:\n");
rossatmsoe 0:c435f76658b2 65 print_patient_record(first_patient,N);
rossatmsoe 0:c435f76658b2 66 }
rossatmsoe 0:c435f76658b2 67
rossatmsoe 0:c435f76658b2 68 //Look up the patient number by searching through the array of patients
rossatmsoe 0:c435f76658b2 69 //and matching the first and last name. strcmp returns 0 if two strings
rossatmsoe 0:c435f76658b2 70 //are identical. Return the patient's position in the array if name is
rossatmsoe 0:c435f76658b2 71 //found, -1 if it is not found.
rossatmsoe 0:c435f76658b2 72 int lookup_patient_name(struct patient_record *first_patient,char*first,char*last)
rossatmsoe 0:c435f76658b2 73 {
rossatmsoe 0:c435f76658b2 74 for(int k=0; k<MAX_PATIENTS; k++) {
rossatmsoe 0:c435f76658b2 75 if(strcmp(first_patient[k].lastname,last) == 0) {
rossatmsoe 0:c435f76658b2 76 if(strcmp(first_patient[k].firstname,first) == 0) {
rossatmsoe 0:c435f76658b2 77 return k;
rossatmsoe 0:c435f76658b2 78 }
rossatmsoe 0:c435f76658b2 79 }
rossatmsoe 0:c435f76658b2 80 }
rossatmsoe 0:c435f76658b2 81 return -1;
rossatmsoe 0:c435f76658b2 82 }
rossatmsoe 0:c435f76658b2 83