2105-2118-การเขียนโปรแกรมคอมพิวเตอร์

ตัวอย่างที่ 1 

#include <stdio.h>

int main()

{

    int b;

printf("Hello CTC And Teacher");

scanf("%d",&b);

return 0;

}

#include <iostream>

using namespace std;

int main()

{

     float number_1,number_2,result;

     char choice_operator,choice_continue;     

     do

     {

          system("cls");          

          cout << "Enter Number : ";

          cin >> number_1;

          cout << "Enter Number : ";

          cin >> number_2;          

          cout << endl;

          cout << "Select Operator" << endl;

          cout << "A)ddition  (+)" << endl;

          cout << "S)ubtraction  (-)" << endl;

          cout << "M)ultiplication  (*)" << endl;

          cout << "D)ivision (/)" << endl;

          cout << "You Select : ";

          cin >> choice_operator;

          cout << endl;

          cout << number_1;

          switch(choice_operator)

          {

            case '+' :                     

            case 'A' :

            case 'a' : cout << " + ";

                             result = number_1 + number_2;

                             break;

            case '-' :           

            case 'S' :

            case 's' : cout << " - ";

                             result = number_1 - number_2;

                             break;

            case '*' :           

            case 'M' :

            case 'm' : cout << " * ";

                              result = number_1 * number_2;

                              break;

            case '/' :

            case 'D' :

            case 'd' : cout << " / ";

                             result = number_1 / number_2;

                             break;              

          }

          cout << number_2 << " = " << result << endl << endl;

          cout << "Continue (Y/N) : ";

          cin >> choice_continue;        

     }

     while(choice_continue == 'Y' || choice_continue == 'y');

      cout << endl << "Exit Program...";

     cout << endl << endl;

     system("pause");

 }