added homework 2

HW2_182416MVEB_Tran_Vu/data.txt

+8 5
+5 4 5 0 2
+0 0 0 3 3
+2 1 3 4 3
+5 4 3 1 2
+5 5 5 1 4
+4 5 3 5 4
+4 4 3 4 5
+5 5 5 5 5
\ No newline at end of file

HW2_182416MVEB_Tran_Vu/main.c

+/*
+ * File:   homework2.c
+ * Author: Tran Minh Huy Vu
+ *
+ * Created on October 4, 2018, 1:50 PM
+ * Description: Creating a 2D array as a score database for students and their grades
+ *              and calculate the average and find the best student.
+ */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+typedef struct {
+  int grades[15];
+  float average;
+} student;
+
+void getArrayDimension(char*, int);
+void getStudentGrades(student*, int, int);
+void displayFinalMatrix(student*, int, int);
+float getAverage(student, int);
+int findBestStudent(student*, int);
+
+int main () {
+  char arrayDimension[20];
+  getArrayDimension(arrayDimension, 20);
+  char* buff = strtok(arrayDimension, " ");
+  int studentsNo = atoi(buff);
+  buff = strtok(NULL, " ");
+  int coursesNo = atoi(buff);
+
+  student studentList[studentsNo];
+  getStudentGrades(studentList, studentsNo, coursesNo);
+  displayFinalMatrix(studentList, studentsNo, coursesNo);
+  int bestStudent = findBestStudent(studentList, studentsNo);
+  printf("\nBest Student: STUDENT%0.2d\n", bestStudent + 1);
+
+  return 0;
+}
+
+void getArrayDimension(char* output, int size) {
+  FILE* data = fopen("data.txt", "r");
+  fgets(output, sizeof(char) * size, data);
+  fclose(data);
+}
+
+void getStudentGrades(student* studentList, int studentsNo, int coursesNo) {
+  char buffer[100];
+  char* mark;
+  FILE* data = fopen("data.txt", "r");
+  fgets(buffer, sizeof(buffer), data);
+
+  for (int i = 0; i < studentsNo; i++) {
+    fgets(buffer, sizeof(buffer), data);
+    mark = strtok(buffer, " ");
+    studentList[i].grades[0] = atoi(mark);
+    for (int j = 1; j < coursesNo; j++) {
+      mark = strtok(NULL, " ");
+      studentList[i].grades[j] = atoi(mark);
+    }
+  }
+  fclose(data);
+}
+
+void displayFinalMatrix(student* studentList, int studentsNo, int coursesNo) {
+  printf("Final marks matrix\n\t\t");
+  for (int i = 0; i < coursesNo; i++) {
+    printf("S%0.2d\t", i + 1);
+  }
+  printf("AVERAGE\n");
+  for (int i = 0; i < studentsNo; i++) {
+    printf("  STUDENT%0.2d", i + 1);
+    for (int j = 0; j < coursesNo; j++) {
+      printf("\t  %d", studentList[i].grades[j]);
+    }
+    studentList[i].average = getAverage(studentList[i], coursesNo);
+    printf("\t  %0.3f\n", studentList[i].average);
+  }
+}
+
+float getAverage(student currentStudent, int coursesNo) {
+  float total = 0;
+  for (int i = 0; i < coursesNo; i++) {
+    total += currentStudent.grades[i];
+  }
+  return (float)(total / coursesNo);
+}
+
+int findBestStudent(student* studentList, int studentsNo) {
+  int bestStudent;
+  float bestScore = -1;
+  for (int i = 0; i < studentsNo; i++) {
+    if (studentList[i].average > bestScore) {
+      bestStudent = i;
+      bestScore = studentList[i].average;
+    }
+  }
+  return bestStudent;
+}