From 4d82d1d64f82a2318704ed07409b68fc58852420 Mon Sep 17 00:00:00 2001
From: Andrew <mrcluster@ya.ru>
Date: Sat, 23 Nov 2019 02:39:51 +0700
Subject: [PATCH] pb/z13

---
 1sem/programming basics/z13/37.cpp | 36 +++++++++++++++++++++++++++++
 1sem/programming basics/z13/38.cpp | 31 +++++++++++++++++++++++++
 1sem/programming basics/z13/39.cpp | 37 ++++++++++++++++++++++++++++++
 3 files changed, 104 insertions(+)
 create mode 100644 1sem/programming basics/z13/37.cpp
 create mode 100644 1sem/programming basics/z13/38.cpp
 create mode 100644 1sem/programming basics/z13/39.cpp

diff --git a/1sem/programming basics/z13/37.cpp b/1sem/programming basics/z13/37.cpp
new file mode 100644
index 0000000..faafcaf
--- /dev/null
+++ b/1sem/programming basics/z13/37.cpp	
@@ -0,0 +1,36 @@
+// pb_z13_37.cpp
+// Горбацевич Андрей
+#include <iostream>
+#include <fstream>
+#define MAX_STRING 500
+
+using namespace std;
+
+void join(const char *sep, istream &ist, ostream &ost);
+
+int main() {
+    ifstream inf("in.txt");
+    ofstream fout("out.txt", ios::trunc);
+    if (!inf.is_open() || !fout.is_open())
+    {
+        cerr << "Unable to open file" << endl;
+        return 1;
+    }
+
+    string sep;
+    cout << "Enter separator >>>";
+    getline(cin, sep, '\n');
+    join(sep.c_str(), inf, fout);
+    return 0;
+}
+
+void join(const char *sep, istream &ist, ostream &ost) {
+    while (!ist.eof() && ist.good()) {
+        char buf[MAX_STRING];
+        ist >> buf;
+        ost << buf;
+        if (!ist.eof()) {
+            ost << sep;
+        }
+    }
+}
diff --git a/1sem/programming basics/z13/38.cpp b/1sem/programming basics/z13/38.cpp
new file mode 100644
index 0000000..bf04810
--- /dev/null
+++ b/1sem/programming basics/z13/38.cpp	
@@ -0,0 +1,31 @@
+// pb_z13_38.cpp
+// Горбацевич Андрей
+#include <iostream>
+#include <fstream>
+
+using namespace std;
+
+void rev_lines(istream &ist, ostream &ost);
+
+int main() {
+    ifstream inf("in.txt");
+    ofstream fout("out.txt", ios::trunc);
+    if (!inf.is_open() || !fout.is_open())
+    {
+        cerr << "Unable to open file" << endl;
+        return 1;
+    }
+
+    rev_lines(inf, fout);
+    return 0;
+}
+
+void rev_lines(istream &ist, ostream &ost) {
+    string out;
+    while (!ist.eof() && ist.good()) {
+        string buf;
+        getline(ist, buf);
+        out.insert(0, buf + "\n");
+    }
+    ost << out.substr(0, out.size()-1);
+}
diff --git a/1sem/programming basics/z13/39.cpp b/1sem/programming basics/z13/39.cpp
new file mode 100644
index 0000000..72efc9b
--- /dev/null
+++ b/1sem/programming basics/z13/39.cpp	
@@ -0,0 +1,37 @@
+// pb_z13_39.cpp
+// Горбацевич Андрей
+#include <iostream>
+#include <fstream>
+
+using namespace std;
+
+void wrap_text(istream &ist, ostream &ost, int max_line_len);
+
+int main() {
+    ifstream inf("in.txt");
+    ofstream fout("out.txt", ios::trunc);
+    if (!inf.is_open() || !fout.is_open())
+    {
+        cerr << "Unable to open file" << endl;
+        return 1;
+    }
+
+    int max_line_len = 0;
+    cout << "Maximal line length >>>";
+    cin >> max_line_len;
+    wrap_text(inf, fout, max_line_len);
+    return 0;
+}
+
+void wrap_text(istream &ist, ostream &ost, int max_line_len) {
+    int cl = 0;
+    char c;
+    while ((c = ist.get()) && !ist.eof() && ist.good()) {
+        if (cl >= max_line_len) {
+            cl = 0;
+            ost << endl;
+        }
+        ost << c;
+        cl++;
+    }
+}