Add source code of Lesson 7

Bai thuc hanh so 7/bai1.cpp

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+#include <iostream>
+#include <fstream>
+
+using namespace std;
+
+int main(){
+  ifstream InputFile("FIRSTFILE.txt");
+  string s;
+  while (getline(InputFile,s)){
+    cout << s << endl;
+  }
+  InputFile.close();
+  return 0;
+}

Bai thuc hanh so 7/bai2.cpp

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+#include <iostream>
+#include <fstream>
+
+using namespace std;
+
+int main(){
+  ofstream ofile1,ofile2;
+  ofile1.open("FILE1.txt");
+  ofile1 << "7 2\n1 2 3 1\n2 2 4 1\n3 3 5 1\n";
+  ofile1.close();
+  ofile2.open("FILE2.txt");
+  ofile2 << "4 1 1 2\n5 2 2 2\n6 3 3 2\n7 4 4 2\n";
+  ofile2.close();
+  ifstream ifile1("FILE1.txt");
+  ifstream ifile2("FILE2.txt");
+  ofstream ofile3("FILE3.txt");
+  ofile3 << ifile1.rdbuf() << ifile2.rdbuf();
+  ifile1.close();
+  ifile2.close();
+  ofile3.close();
+  ifstream ifile3("FILE3.txt");
+  string s;
+  while (getline(ifile3,s)){
+    cout << s << endl;
+  }
+  ifile3.close();
+  return 0;
+}

Bai thuc hanh so 7/bai3.cpp

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+#include <iostream>
+#include <fstream>
+
+using namespace std;
+
+int main(){
+  int n,m;
+  cout << "Nhap n: ";
+  cin >> n;
+  cout << "Nhap m: ";
+  cin >> m;
+  ofstream ofile;
+  ofile.open("MATRIX.txt");
+  ofile << n << " " << m << endl;
+  for (int i=0;i<n;i++){
+    for (int j=0;j<m;j++){
+      cout << "Nhap a[" << i+1 << "," << j+1 << "]: ";
+      int temp;
+      cin >> temp;
+      ofile << temp << " ";
+    }
+    ofile << endl;
+  }
+  ofile.close();
+
+  int a[1000][1000];
+  ifstream ifile("MATRIX.txt");
+  ifile >> n >> m;
+  for (int i=0;i<n;i++){
+    for (int j=0;j<m;j++){
+      ifile >> a[i][j];
+    }
+  }
+  cout << "Mang hai chieu da nhap la: " << endl;
+  for (int i=0;i<n;i++){
+    for (int j=0;j<m;j++){
+      cout << a[i][j] << " ";
+    }
+    cout << endl;
+  }
+  return 0;
+}

Bai thuc hanh so 7/bai4.cpp

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+#include <iostream>
+#include <fstream>
+
+using namespace std;
+
+int main(){
+  int n;
+  cout << "Nhap so phan tu cua mang: ";
+  cin >> n;
+  int a[n];
+  for (int i=0;i<n;i++){
+    cout << "Nhap phan tu thu " << i+1 << " cua mang: ";
+    cin >> a[i];
+  }
+  ofstream ofile;
+  ofile.open("DATHUC.txt");
+  ofile << n << endl;
+  for (int i=0;i<n;i++){
+    ofile << a[i] << " ";
+  }
+  ofile << endl;
+  for (int i=0;i<n;i++){
+    ofile << a[i] << " x " << i;
+    if (i!=n-1){
+      ofile << " + ";
+    }
+    else ofile << "." << endl;
+  }
+  ofile.close();
+
+  ifstream ifile("DATHUC.txt");
+  string s;
+  while (getline(ifile,s)){
+    cout << s << endl;
+  }
+  ifile.close();
+  return 0;
+}