Tasks: Select if and else statements in c ++

370 thoughts on “Tasks: Select if and else statements in c ++”

1. #include “stdafx.h”
   #include

   int main()
   {
   std::cout <> a >> b;

   std::cout << "How much will " << a << "*" << b << "?" << std::endl;

   std::cout <> c;

   if (a * b == c) std::cout << "Well done, the answer is correct!\n";
   else if (a * b != c) std::cout << "Sorry, the answer is not true! Go study! :(\n";

   return 0;
   }

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2. Please help. I have a really hard time with tasks.
   – – – – –
   #include
   using namespace std;

   int main()
   {
   int a = 0;
   int b = 0;
   int c = a * b;

   cout <> a;
   cin >> b;

   cout << "Результат умножения a * b ?";

   if (c == a*b)
   cout << "Правильно" << endl;
   else if (c!== a * b)
   cout << "Неправльно! Answer: " << c == a * b << endl << end;

   system("pause");
   return 0;
   }

   Reply

   1. I'm not an expert, I just started learning C++ but try this.
      You didn't name the directory at the beginning and else if the loop doesn't end
      You also have an explanation in Russian, if you want it like that, add setlocale(LC_ALL, “rus”);

      #include
      using namespace std;

      int main()
      {
      int a,b,c;

      cout <> a;
      cout <> b;
      cout <> c;

      if (c == a * b)
      cout << "verno"<<endl;
      else
      cout << "ne verno "<<endl;

      return 0;
      }

      Reply

      1. #include
         using namespace std;

         int main()
         {
         int a,b,c;

         cout <> a;
         cout <> b;
         cout <> c;

         if (c == a * b)
         cout << "verno"<<endl;
         else
         cout << "ne verno "<<endl;

         return 0;
         }

      2. Why can’t I copy the script normally?. cin, \n swallowed? What crap.

3. I spent a long time reading through the comments on the 3rd problem and I don’t understand why people don’t have an entry point for data and the result of the product.
   Here is my solution, please check and write a comment, Thank you.
   int a = 0;
   int b = 0;
   int c = 0;
   int d = 0;

   cout <> a;

   cout <> b;

   cout <> d;

   c = a * b;

   if (d == c)
   cout << "Otvet veren.";

   if (d != c)
   cout << "Otvet ne veren, " << "Pravil'nii otvet = " << c << endl;

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4. and, understand, cin is erased in the comments >> .

   Reply

5. I decided to share my last task.. Everything is working,but I can't get the program to work, when entering an ambiguous number, roll back to the very beginning. Therefore the program works for any number

   #include
   using namespace std;

   int main (){
   setlocale(LC_ALL,”rus”);

   int FirstNumber = 0;
   int SecondNumber = 0;
   int answer;
   cout<<"Программа для проверки знаний по таблице умножения."<<endl;
   cout<<"=================================================="<<endl;
   cout<<"Введите два однозначных числа"<<endl;
   cout<>FirstNumber;
   cout<>SecondNumber;
   cout<<"Ответ:"<<FirstNumber<<"*"<<SecondNumber<>answer;

   if (FirstNumber*SecondNumber==answer) cout<<"Ответ правильный!";
   else if (FirstNumber*SecondNumberanswer) {cout<<"Ответ не правильный!"<<endl;
   answer=FirstNumber*SecondNumber;
   cout<<"Правильный ответ:"<<endl<<FirstNumber<<"*"<<SecondNumber<<"="<<answer;
   }
   return 0;
   }

   Reply

6. please comment on my logic in writing task No. 1.
   The program performs the assigned task, but it differs radically from the author’s example. so I'm worried, maybe I'm thinking in the wrong direction, It's better to fix it at the beginning of training.
   Thank you.

   #include
   using namespace std;

   int main()
   {
   setlocale(LC_ALL, “rus”);

   int a(0);
   cout <> a;
   cout <= 1 && a <= 9999)
   {
   if ((a / 1000) % 10)
   {
   if ((a / 1000) % 10 == 1) cout << "одна тысяча ";
   else if ((a / 1000) % 10 == 2) cout << "две тысячи ";
   else if ((a / 1000) % 10 == 3) cout << "три тысячи ";
   else if ((a / 1000) % 10 == 4) cout << "четыре тысячи ";
   else if ((a / 1000) % 10 == 5) cout << "пять тысяч ";
   else if ((a / 1000) % 10 == 6) cout << "шесть тысяч ";
   else if ((a / 1000) % 10 == 7) cout << "семь тысяч ";
   else if ((a / 1000) % 10 == 8) cout << "восемь тысяч ";
   else cout << "девять тысяч ";
   a %= 1000;
   }

   if ((a / 100) % 10)
   {
   if ((a / 100) % 10 == 1) cout << "сто ";
   else if ((a / 100) % 10 == 2) cout << "двести ";
   else if ((a / 100) % 10 == 3) cout << "триста ";
   else if ((a / 100) % 10 == 4) cout << "четыреста ";
   else if ((a / 100) % 10 == 5) cout << "пятьсот ";
   else if ((a / 100) % 10 == 6) cout << "шестьсот ";
   else if ((a / 100) % 10 == 7) cout << "семьсот ";
   else if ((a / 100) % 10 == 8) cout << "восемьсот ";
   else cout << "девятьсот ";
   a %= 100;
   }

   if ((a / 10) % 10)
   {
   if ((a / 10) % 10 == 2) cout << "двадцать ";
   else if ((a / 10) % 10 == 3) cout << "тридцать ";
   else if ((a / 10) % 10 == 4) cout << "сорок ";
   else if ((a / 10) % 10 == 5) cout << "пятьдесят ";
   else if ((a / 10) % 10 == 6) cout << "шестьдесят ";
   else if ((a / 10) % 10 == 7) cout << "семьдесят ";
   else if ((a / 10) % 10 == 8) cout << "восемьдесят ";
   else if ((a / 10) % 10 == 9) cout << "девяносто ";

   else if ((a / 10) % 10 == 1)
   {
   a %= 10;
   if (a == 0) cout << "десять ";
   else if (a == 1) cout << "одиннадцать ";
   else if (a == 2) cout << "двенадцать ";
   else if (a == 3) cout << "тринадцать ";
   else if (a == 4) cout << "четырнадцать ";
   else if (a == 5) cout << "пятнадцать ";
   else if (a == 6) cout << "шестнадцать ";
   else if (a == 7) cout << "семнадцать ";
   else if (a == 8) cout << "восемнадцать ";
   else if (a == 9) cout << "девятнадцать ";

   cout <= 2 && a % 10 <= 4) cout <= 5 && a % 10 <= 9 || a == 0) cout << "ов";
   cout << " США\n";
   return 0;
   }
   a %= 10;
   }

   if (a)
   {
   if (a == 1) cout << "один ";
   else if (a == 2) cout << "два ";
   else if (a == 3) cout << "три ";
   else if (a == 4) cout << "четыре ";
   else if (a == 5) cout << "пять ";
   else if (a == 6) cout << "шесть ";
   else if (a == 7) cout << "семь ";
   else if (a == 8) cout << "восемь ";
   else cout << "девять ";
   }
   cout <= 2 && a % 10 <= 4) cout <= 5 && a % 10 <= 9 || a == 0) cout << "ов";
   cout << " США\n";
   }
   else cout << "неверная сумма, повторите ввод \n";

   return 0;
   }

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7. it turned out to be a mess. how to delete text in a comment without losing data?

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8. #include
   #include

   using namespace std;

   /* run this program using the console pauser or add your own getch, system(“pause”) or input loop */

   int main(int argc, char** argv) {

   int firstValue;
   int secondValue;

   cout <> firstValue;

   if (firstValue > 9)
   {
   cout << "\nyou must enter value from 1 to 9\n";
   }
   else if (firstValue < 1)
   {
   cout << "\nyou must enter value from 1 to 9\n";
   }

   cout <> secondValue;
   if (secondValue > 9)
   {
   cout << "\nyou must enter value from 1 to 9\n";
   }
   else if (secondValue < 1)
   {
   cout <<"\nyou must enter value from 1 to 9\n";
   }

   int userAnswer;
   int rightAnswer;
   rightAnswer = firstValue * secondValue;

   cout << firstValue << " * " << secondValue <> userAnswer;
   if (userAnswer==rightAnswer)
   {
   cout << "\nAnswer is right!\n";
   }
   else
   {
   cout << "\nYou lost! Right answer is: " << rightAnswer << "\n";
   }

   return 0;
   }

   Reply