fibbonaci

.gitignored

+*.exe
+.vscode
\ No newline at end of file

main.cpp

+#include<iostream>
+/*
+Числа фибоначи
+Мы хотим получить n-ный символ ряда Фиббоначи
+На входе программы число n
+Должна вывсети число.
+*/
+
+long long unsigned fibbonaci(int n) {
+    if (n == 1 || n == 2) {
+        return 1;
+    }
+    long long unsigned result_1 = 1;
+    long long unsigned result_2 = 1;
+    for (int i = 3; i <= n; i++) {   
+        result_2 = result_1 + result_2;
+        result_1 = result_2 - result_1;
+    }
+    return result_2;
+}
+
+int main(int argc, char* argv[]) {
+    if (argc != 2) {
+        std::cout << "Incorrect usage" << std::endl; 
+        return 1;
+    }
+
+    std::cout << argv[1] << std::endl;
+
+
+    int n = atoi(argv[1]);
+
+    if (n < 1) {
+        std::cout << "Use a nomber > 0" << std::endl;
+        return 2;
+    }
+    
+    if (n > 93) {
+        std::cout << "Number too big!" << std::endl;
+        return 3;
+    }
+
+    for (int i = 1; i <= n; i++) {
+        std::cout << "Number " << i << ": " <<fibbonaci(i) << std::endl;
+    }
+
+    std::cout << fibbonaci(n) << std::endl;
+
+    std::cout << "Hello world" << std::endl;
+    return 0;
+}
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