pb/z14

1sem/programming basics/z14/41.cpp

@@ -0,0 +1,35 @@
+// pb_z14_41.cpp
+// Горбацевич Андрей
+#include <iostream>
+#include <fstream>
+
+using namespace std;
+
+void write_cyclic_one(ostream &ost, size_t N);
+
+int main() {
+    ifstream inf("in.txt");
+    ofstream fout("out.bin", ios::trunc|ios::binary);
+    if (!inf.is_open() || !fout.is_open())
+    {
+        cerr << "Unable to open file" << endl;
+        return 1;
+    }
+
+    int N = 0;
+    inf >> N;
+    write_cyclic_one(fout, N);
+    return 0;
+}
+
+void write_cyclic_one(ostream &ost, size_t N) {
+    unsigned char cval = 0x01;
+    unsigned char mval = 0x80;
+    for (size_t i = 0; i < N; i +=2) {
+        if (cval >= mval) {
+            cval = 0x01;
+        }
+        ost << cval;
+        cval <<= 1u;
+    }
+}