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C++/files/file.cpp

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+//Ñîçäàòåëü Âëàäèñëàâ Óòêèí.
+#include <iostream>
+#include <fstream>
+
+using namespace std;
+
+int main() {
+	setlocale(LC_ALL, "Russian");
+	ofstream f;
+	f.open ("file1.txt");
+	f<<"write_in_file._author_utkin";
+	f.close ();
+    return 0;
+}
+

C++/files/file1.txt

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+2 5 3 4 5 6 8 7 5

C++/files/file2.cpp

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+//Ñîçäàòåëü Âëàäèñëàâ Óòêèí.
+#include <iostream>
+#include <fstream>
+
+using namespace std;
+
+int main() {
+    int i,var;
+    
+	setlocale(LC_ALL, "Russian");
+	ofstream f;
+	f.open ("file1.txt");
+	for (i=1; i<=9; i++) {
+	cout <<"Ââåäèòå ÷èñëî";
+	cin >>var;
+    f<<var<<" ";
+}
+	f.close();
+	ifstream d;
+	d.open ("file1.txt");
+	while (!d.eof()) {
+		d>>var;
+		cout <<var<<endl;
+	}
+	
+	d.close();
+    system ("pause");
+    return 0;
+}
+

C++/files/input.txt

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+6 2
+-2.0 0.0
+0.0 3.0
+2.0 2.0
+2.0 -2.0
+0.0 -3.0
+-2.0 -2.0

C++/files/input_1.txt

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+6 2

C++/files/output.txt

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+35.1538

C++/files/pert.cpp

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+//Ñîçäàòåëü Âëàäèñëàâ Óòêèí.
+#include <iostream>
+#include <fstream>
+#include <cmath>
+
+using namespace std;
+
+int main() {
+	int n;
+	double r,pi,a1,b1,per,a2,b2,a,b;
+	per=0;
+	ifstream d;
+	d.open ("input.txt");
+	d>>n;
+	d>>r;
+	d>>a1;
+	d>>b1;
+	a=a1;
+	b=b1;
+	while (!d.eof()) {
+		d>>a2;
+		d>>b2;
+		per=per+(sqrt((a2-a1)*(a2-a1)+(b2-b1)*(b2-b1)));
+		a1=a2; b1=b2;
+	}
+	per=per+sqrt((a1-a)*(a1-a)+(b1-b)*(b1-b)+(a2-a1)*(a2-a1)+(b2-b1)*(b2-b1));
+	per=per+((2*3.14*r)/4)*n;
+	d.close();
+	ofstream f;
+	f.open ("output.txt");
+	f<<per;
+	f.close();
+    return 0;
+}

C++/files/read.cpp

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+//Ñîçäàòåëü Âëàäèñëàâ Óòêèí.
+#include <iostream>
+#include <fstream>
+
+using namespace std;
+
+int main() {
+	setlocale(LC_ALL, "Russian");
+	char s[80];
+	ifstream f;
+	f.open ("file1.txt");
+	f>>s;
+	cout<<s<<endl;
+	f.close ();
+    system ("pause");
+    return 0;
+}
+

C++/files/zadach1.cpp

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+//Ñîçäàòåëü Âëàäèñëàâ Óòêèí.
+#include <iostream>
+#include <fstream>
+
+using namespace std;
+
+int main() {
+	setlocale(LC_ALL, "Russian");
+	int a,b,i,p,var;
+	ifstream f;
+	f.open("input_1.txt");
+	f>>a>>b;
+	p=1;
+	for (i=1; i<=b; i++) {
+		p=p*a;
+	}
+	f.close ();
+	var=p%10;
+	ofstream d;
+	d.open ("zadacha_1.txt");
+	d<<var<<endl;
+	d.close ();
+	cout<<var<<endl;
+    return 0;
+}

C++/files/zadacha_1.txt

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+6