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14 - Struct/ex1.c

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+#include "PointersLibs.h"
+
+#define MAXSIZE 256
+#define MAT_SIZE 6
+
+struct study_hours
+{
+    string teacher;
+    unsigned short subject;
+    int total_students;
+};
+
+unsigned int TeachesCountMaxHoursStraightInDay(struct study_hours *ptr_mat_day, unsigned short rows, unsigned short cols)
+{
+    unsigned short max = ZERO;
+    unsigned short counter = ONE;
+    struct study_hours *ptr_temp = ptr_mat_day + cols;
+    rows--;
+    while (rows--)
+    {
+        if (!StringCompare(&((*ptr_mat_day).teacher), &((*ptr_temp).teacher))) 
+        {
+            max = (counter > max) ? counter : max;
+            counter = ZERO;
+        }
+        counter++;
+        ptr_mat_day += cols;
+        ptr_temp += cols;
+    }
+    
+    return (max);
+}
+
+struct study_hours * TeachesMaxHoursStraightInDay(struct study_hours *ptr_mat_day, unsigned short rows, unsigned short cols)
+{
+    unsigned short counter = ONE,
+                    max = ZERO;
+    struct study_hours *ptr_temp = ptr_mat_day + cols;
+    struct study_hours *ptr_max_teacher = ptr_mat_day;
+    rows--;
+    while (rows--)
+    {
+        if (!StringCompare(&((*ptr_mat_day).teacher), &((*ptr_temp).teacher)))
+        { 
+            max = (counter > max) ? counter : max;
+            counter = ZERO;
+        }
+        counter++;
+        ptr_mat_day += cols;
+        ptr_temp += cols;
+    }
+    
+    return (ptr_max_teacher);
+}
+
+// Ex1
+struct study_hours * WhoTeachesMoreThanFourHoursStraight(struct study_hours *ptr_mat, unsigned short rows, unsigned short cols)
+{
+    unsigned short day = cols;
+    while (TeachesCountMaxHoursStraightInDay(ptr_mat++, rows, cols) < FIVE && day--);
+
+    return (TeachesMaxHoursStraightInDay(--ptr_mat, rows, cols));
+}
+
+unsigned short TeacherCountOfHoursInDay(struct study_hours *ptr_mat, unsigned short rows, unsigned short cols, string teacher)
+{
+    unsigned short counter = ZERO;
+    rows--;
+    while (rows--)
+    {
+        counter += StringCompare(&((*ptr_mat).teacher), teacher);
+        ptr_mat += cols;
+    }
+    
+    return (counter);
+}
+
+// Ex2
+unsigned short TeacherCountOfHoursInWeek(struct study_hours *ptr_mat, unsigned short rows, unsigned short cols, string teacher)
+{
+    unsigned short counter = ZERO;
+    unsigned short day = cols;
+    while (day--)
+    {
+        counter += TeacherCountOfHoursInDay(ptr_mat++, rows, cols, teacher);
+    }
+
+    return counter;
+}
+
+int CountStudentsInSubjectOnDay(struct study_hours *ptr_mat, unsigned short rows, unsigned short cols, unsigned short subject)
+{
+    int counter = ZERO;
+    rows--;
+    while (rows--)
+    {
+        counter += ((*ptr_mat).subject == subject) ? (*ptr_mat).total_students : ZERO;
+        ptr_mat += cols;
+    }
+    
+    return (counter);
+}
+
+// Ex3
+int CountStudentsInSubjectOnWeek(struct study_hours *ptr_mat, unsigned short rows, unsigned short cols, unsigned short subject)
+{
+    int total_students = ZERO;
+    unsigned short days = cols;
+    while (days--)
+    {
+        total_students += CountStudentsInSubjectOnDay(ptr_mat, rows, cols, subject);
+    }
+    
+    return (total_students);
+}
+
+void main(void)
+{
+    string vec_subjects[MAXSIZE];
+}