diff options
Update homework_angel_26-3.cpp
1 files changed, 120 insertions, 64 deletions
| -rw-r--r-- | Sem. 04/homework_angel_26-3/homework_angel_26-3.cpp | 184 |
diff --git a/Sem. 04/homework_angel_26-3/homework_angel_26-3.cpp b/Sem. 04/homework_angel_26-3/homework_angel_26-3.cpp index ff34ed3..0b534c0 100644 --- a/Sem. 04/homework_angel_26-3/homework_angel_26-3.cpp +++ b/Sem. 04/homework_angel_26-3/homework_angel_26-3.cpp @@ -3,26 +3,30 @@ #include<fstream>
#pragma warning(disable : 4996)
-struct Student {
+struct Student
+{
char* name;
int fn;
int gradesCount;
double averageGrade;
};
-struct University {
+struct University
+{
char name[32];
Student* collection;
size_t studentsCount;
};
-void print(const Student& st) {
+void print(const Student& st)
+{
std::cout << std::endl << "======STUDENT======" << std::endl;
std::cout << "Name: " << st.name << std::endl << "Faculcy number:" << st.fn <<
std::endl << "Grades: " << st.gradesCount << std::endl << "Avarage: " << st.averageGrade << std::endl;
}
-Student createStudent(const char* name, int fn, int gradesCount, double avGrade) {
+Student createStudent(const char* name, int fn, int gradesCount, double avGrade)
+{
Student obj;
size_t nameLen = strlen(name);
@@ -37,14 +41,16 @@ Student createStudent(const char* name, int fn, int gradesCount, double avGrade) return obj;
}
-void freeStudent(Student& s) {
+void freeStudent(Student& s)
+{
delete[] s.name;
s.averageGrade = s.fn = s.gradesCount = 0;
}
-void saveStudentToFile(std::ofstream& f, const Student& st) {
+void saveStudentToFile(std::ofstream& f, const Student& st)
+{
size_t nameLen = strlen(st.name);
f.write((const char*)&nameLen, sizeof(nameLen)); //first we write the size of the name!
@@ -55,7 +61,8 @@ void saveStudentToFile(std::ofstream& f, const Student& st) { f.write((const char*)&st.averageGrade, sizeof(st.averageGrade));
}
-Student readStudentFromFile(std::ifstream& f) {
+Student readStudentFromFile(std::ifstream& f)
+{
Student res;
size_t nameLen;
@@ -73,21 +80,24 @@ Student readStudentFromFile(std::ifstream& f) { return res;
}
-University createUniversity(const char* _name, const Student* collection, const size_t& studentCount) {
+University createUniversity(const char* _name, const Student* collection, const size_t& studentCount)
+{
University uni;
strcpy(uni.name, _name);
uni.collection = new Student[studentCount];
uni.studentsCount = studentCount;
- for (size_t i = 0; i < studentCount; i++) {
+ for (size_t i = 0; i < studentCount; i++)
+ {
uni.collection[i] = collection[i];
}
return uni;
}
-void saveUniversityToFile(std::ofstream& outStream, const University& Uni) {
+void saveUniversityToFile(std::ofstream& outStream, const University& Uni)
+{
//Writing the name of the university first:
outStream.write(Uni.name, 32);
@@ -96,12 +106,14 @@ void saveUniversityToFile(std::ofstream& outStream, const University& Uni) { //Writing every single student:
size_t count = Uni.studentsCount;
- for (size_t i = 0; i < count; i++) {
+ for (size_t i = 0; i < count; i++)
+ {
saveStudentToFile(outStream, Uni.collection[i]);
}
}
-University readUniFromFile(std::ifstream& inFile) {
+University readUniFromFile(std::ifstream& inFile)
+{
//to return:
University uni;
@@ -117,26 +129,30 @@ University readUniFromFile(std::ifstream& inFile) { size_t studentsCount = uni.studentsCount;
uni.collection = new Student[studentsCount];
- for (size_t i = 0; i < studentsCount; i++) {
+ for (size_t i = 0; i < studentsCount; i++)
+ {
uni.collection[i] = readStudentFromFile(inFile);
}
return uni;
}
-void printUni(const University& uni) {
+void printUni(const University& uni)
+{
size_t studentsCount = uni.studentsCount;
std::cout << std::endl << "----------" << uni.name << "----------";
- for (size_t i = 0; i < studentsCount; i++) {
+ for (size_t i = 0; i < studentsCount; i++)
+ {
print(uni.collection[i]);
std::cout << std::endl;
}
std::cout << "-------------------------";
}
-void freeUni(University& uni) {
+void freeUni(University& uni)
+{
for (int i = 0; i < uni.studentsCount; i++)
freeStudent(uni.collection[i]);
@@ -144,82 +160,108 @@ void freeUni(University& uni) { uni.studentsCount = 0;
}
-void changeName(University* uniCollection, const int& uniCount, const char* uni, const int& fn, const char* newName) {
+void changeStudentName(Student& st, const char* newName)
+{
+ delete[] st.name;
+ st.name = new char[strlen(newName) + 1];
+ strcpy(st.name, newName);
+}
+
+void changeName(University* uniCollection, const int& uniCount, const char* uni, const int& fn, const char* newName)
+{
int uniFound = -1;
int studentFound = -1;
- for (int i = 0; i < uniCount; i++) {
- if (strcmp(uniCollection[i].name, uni) == 0) {
-
- uniFound = i;
- size_t studentsCount = uniCollection[i].studentsCount;
+ for (int i = 0; i < uniCount; i++)
+ {
+ if (strcmp(uniCollection[i].name, uni) != 0)
+ {
+ continue;
+ }
- for (size_t j = 0; j < studentsCount; j++) {
- if (uniCollection[i].collection[j].fn == fn) {
- studentFound = j;
- //decided to use a pointer to make the code easier to read
- Student* studentPtr = &uniCollection[i].collection[j];
- delete[] studentPtr->name;
- studentPtr->name = new char[strlen(newName) + 1];
- strcpy(studentPtr->name, newName);
+ uniFound = i;
+ size_t studentsCount = uniCollection[i].studentsCount;
- break;
- }
+ for (size_t j = 0; j < studentsCount; j++)
+ {
+ if (uniCollection[i].collection[j].fn != fn)
+ {
+ continue;
}
+
+ studentFound = j;
+ changeStudentName(uniCollection[i].collection[j], newName);
break;
}
+ break;
}
- if (uniFound != -1 && studentFound != -1) {
+ if (uniFound != -1 && studentFound != -1)
+ {
std::cout << std::endl << "Changed: " << std::endl;
print(uniCollection[uniFound].collection[studentFound]);
}
- else {
+ else
+ {
std::cout << std::endl << "No such student in this university" << std::endl;
}
}
-void addGrade(University* uniCollection, const int& uniCount, const char* uni, const int& fn, const int& grade) {
+void addStudentGrade(Student& st, const int& grade)
+{
+ double newAvarageGrade = (double)((st.averageGrade * st.gradesCount) + grade) / (double)(st.gradesCount + 1);
+ st.averageGrade = newAvarageGrade;
+ st.gradesCount++;
+}
+
+void addGrade(University* uniCollection, const int& uniCount, const char* uni, const int& fn, const int& grade)
+{
int uniFound = -1;
int studentFound = -1;
- for (int i = 0; i < uniCount; i++) {
- if (strcmp(uniCollection[i].name, uni) == 0) {
-
- uniFound = i;
- size_t studentsCount = uniCollection[i].studentsCount;
-
- for (size_t j = 0; j < studentsCount; j++) {
- if (uniCollection[i].collection[j].fn == fn) {
- studentFound = j;
- Student* studentPtr = &uniCollection[i].collection[j];
+ for (int i = 0; i < uniCount; i++)
+ {
+ if (strcmp(uniCollection[i].name, uni) != 0)
+ {
+ continue;
+ }
- double newAvarageGrade = (double)((studentPtr->averageGrade * studentPtr->gradesCount) + grade) / (double)(studentPtr->gradesCount + 1);
- studentPtr->averageGrade = newAvarageGrade;
- studentPtr->gradesCount++;
+ uniFound = i;
+ size_t studentsCount = uniCollection[i].studentsCount;
- break;
- }
+ for (size_t j = 0; j < studentsCount; j++)
+ {
+ if (uniCollection[i].collection[j].fn != fn)
+ {
+ continue;
}
+
+ studentFound = j;
+ addStudentGrade(uniCollection[i].collection[j], grade);
break;
}
+ break;
}
- if (uniFound != -1 && studentFound != -1) {
+ if (uniFound != -1 && studentFound != -1)
+ {
std::cout << std::endl << "Added: " << std::endl;
print(uniCollection[uniFound].collection[studentFound]);
}
- else {
+ else
+ {
std::cout << std::endl << "No such student in this university" << std::endl;
}
}
-double getSuccess(const University uni) {
+double getSuccess(const University uni)
+{
double avarageGrade = 0;
size_t studentsCount = uni.studentsCount;
- for (size_t i = 0; i < studentsCount; i++) {
+ for (size_t i = 0; i < studentsCount; i++)
+ {
avarageGrade += uni.collection[i].averageGrade;
}
@@ -228,18 +270,25 @@ double getSuccess(const University uni) { return avarageGrade;
}
-void swapUniversities(University* uniCollection, const int& first, const int& second) {
+void swapUniversities(University* uniCollection, const int& first, const int& second)
+{
University temp = uniCollection[first];
uniCollection[first] = uniCollection[second];
uniCollection[second] = temp;
}
-void sort(University* uniCollection, size_t unisCount) {
+void sort(University* uniCollection, size_t unisCount)
+{
//selection sort
- for (int pos = 0; pos < unisCount - 1; pos++) {
+ for (int pos = 0; pos < unisCount - 1; pos++)
+ {
int minimalIndex = pos;
- for (int i = pos; i < unisCount; i++) {
- if (getSuccess(uniCollection[i]) > getSuccess(uniCollection[minimalIndex])) {
+
+ for (int i = pos; i < unisCount; i++)
+ {
+ int currSuccess = getSuccess(uniCollection[minimalIndex]);
+ if (getSuccess(uniCollection[i]) > currSuccess)
+ {
minimalIndex = i;
}
}
@@ -249,7 +298,8 @@ void sort(University* uniCollection, size_t unisCount) { }
}
-int main() {
+int main()
+{
//simple example:
//creating university database:---------------
@@ -291,15 +341,19 @@ int main() { std::ofstream outFile("path.txt", std::ios::binary);
saveUniversityToFile(outFile, uniCollection[1]);
if (outFile.good() == 0)
+ {
std::cout << "Error saving the file";
+ }
outFile.close();
std::ifstream inFile("path.txt", std::ios::binary);
University example = readUniFromFile(inFile);
- if (inFile.good() == 0)
+ if (inFile.good() == 0)
+ {
std::cout << "Error reading the file";
+ }
inFile.close();
@@ -312,11 +366,13 @@ int main() { std::cout << "\nSorted:\n";
- for (int i = 0; i < 3; i++) {
+ for (int i = 0; i < 3; i++)
+ {
std::cout << i + 1 << ". " << uniCollection[i].name << std::endl;
}
- for (int i = 0; i < 3; i++) {
+ for (int i = 0; i < 3; i++)
+ {
freeUni(uniCollection[i]);
}
-}
\ No newline at end of file +}
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