diff options
1 files changed, 39 insertions, 17 deletions
| -rw-r--r-- | Sem. 02/task3_not_done.cpp | 56 |
diff --git a/Sem. 02/task3_not_done.cpp b/Sem. 02/task3_not_done.cpp index d473e70..481f989 100644 --- a/Sem. 02/task3_not_done.cpp +++ b/Sem. 02/task3_not_done.cpp @@ -1,5 +1,6 @@ #include <iostream> #include <fstream> +#include <cstring> #pragma warning(disable:4996) using namespace std; @@ -29,6 +30,7 @@ struct StudentRecord struct StudentCollection { StudentRecord* data; + size_t studentsCount; }; size_t getLinesCount(const char* fileName) @@ -101,48 +103,68 @@ void printStudent(const StudentRecord& st) } -size_t initStudentCollection(StudentCollection& collection, const char* fileName) +void initStudentCollection(StudentCollection& collection, const char* fileName) { - size_t studentsCount = getLinesCount(fileName) - 1; - - collection.data = new StudentRecord[studentsCount]; - + size_t linesCount = getLinesCount(fileName); + + size_t studentsCount = linesCount - 1; + ifstream file(fileName); - if (!file.is_open()) + if (studentsCount == 0 || !file.is_open()) { - cout << "error"; - return 0; + cout << "Error while reading from file!" << std::endl; + collection.studentsCount = 0; + collection.data = nullptr; + + return; } + + collection.data = new StudentRecord[studentsCount]; + collection.studentsCount = studentsCount; char buff[capacity]; - file.getline(buff, capacity); + file.getline(buff, capacity); ///skip the header for (int i = 0; i < studentsCount; i++) { file.getline(buff, capacity); parseStudent(collection.data[i], buff); + + printStudent(collection.data[i]); } - - return studentsCount; } -void saveToFile(const char* fileName, const StudentCollection& collection, size_t studentsCount) +void saveToFile(const char* fileName, const StudentCollection& collection) { ofstream file(fileName); if (!file.is_open()) return; file << "Ime, Familiya, Fakulteten nomer, Imeyl adres" << std::endl; //header; - for (int i = 0; i < studentsCount; i++) - file << collection.data[i].firstName << "," << collection.data[i].lastName << "," << collection.data[i].fnRaw << "," << collection.data[i].email << std::endl; + for (int i = 0; i < collection.studentsCount; i++) + { + file << collection.data[i].firstName << "," << collection.data[i].lastName << "," << collection.data[i].fnRaw << "," << collection.data[i].email; + + bool isLast = i == collection.studentsCount - 1; + + if(!isLast) + file << std::endl; + } } int main() { - const char* fileName = "lists/all_students.csv"; + const char* fileName = "students.txt"; StudentCollection collection; - size_t studentsCount = initStudentCollection(collection, fileName); + initStudentCollection(collection, fileName); + if(collection.studentsCount == 0) + { + std::cout << "Error! No students loaded!" << std::endl; + return -1; + } //changes to students email - saveToFile(fileName, collection, studentsCount); + saveToFile(fileName, collection); delete[] collection.data; + + return 0; } |