Kamis, Mei 08, 2014

Define Char Variable As Input

We will make syntax in which while program is run then program will ask user to input a character from keyboard PC. Example of using of char variable as input:
  1. Open Dev C++
  2. File menu > New > Source File, then will be created a new worksheet titled Untitled1
  3. File menu > Save As. On Save as type: choose C source files (*.c) and on File name, example we give name introduction to char and string variable part 2.c
  4. First, type minimal required syntax on C programming:

    main()
    {
    }


  5. Add getch() function in main() function to show program result while be Run, so that program syntax be:

    main()
    {
      getch();
    }


  6. Define name of a variable as a char variable:

    main()
    {
      char name_of_char;
      getch();
    }


  7. Define name_of_char variable as input with add syntax:

    name_of_char = getchar();

    so that program syntax becomes:

    main()
    {
      char name_of_char;
      name_of_char = getchar();
      getch();
    }


    So user know when must type input from PC keyboard, should given comment/instruction in printf() function,

    main()
    {
      char name_of_char;
      printf("Type a character from PC keyboard! ");
      name_of_char = getchar();
      getch();
    }


  8. To show character typed by user can be used printf() function with use code %c

    main()
    {
      char name_of_char;
      printf("Type a character from PC keyboard! ");
      name_of_char = getchar();
      printf("%c", name_of_char);
      getch();
    }


    Can also added sentence:

    main()
    {
      char name_of_char;
      printf("Type a character from PC keyboard! ");
      name_of_char = getchar();
      printf("Character is typed by user is: %c", name_of_char);
      getch();
    }


  9. Example we want to add 2 other char variables as input:

    main()
    {
      char name_of_char;
      printf("Type a first character! ");
      name_of_char = getchar();
      printf("First character typed: %c \n \n", name_of_char);
      char name_of_char2;
      printf("Type a second character! ");
      getchar();
      name_of_char2 = getchar();
      printf("Second character typed: %c \n \n", name_of_char2);
      char name_of_char3;
      printf("Type a third character! ");
      getchar();
      name_of_char3 = getchar();
      printf("Third Character typed: %c \n \n", name_of_char3);
      getch();
    }


    To get same display of program result, program syntax can be witten as follows:

    main()
    {
      char name_of_char;
      char name_of_char2;
      char name_of_char3;
      printf("Type a first character! ");
      name_of_char = getchar();
      printf("First character typed: %c \n \n", name_of_char);
      printf("Type a second character! ");
      getchar();
      name_of_char2 = getchar();
      printf("Second character typed: %c \n \n", name_of_char2);
      printf("Type a third character! ");
      getchar();
      name_of_char3 = getchar();
      printf("Third Character typed: %c \n \n", name_of_char3);
      getch();
    }


    To get different display of program result, program syntax can be written as follows:

    main()
    {
      char name_of_char;
      char name_of_char2;
      char name_of_char3;
      printf("Type a first character! ");
      name_of_char = getchar();
      printf("Type a second character! ");
      getchar();
      name_of_char2 = getchar();
      printf("Type a third character! ");
      getchar();
      name_of_char3 = getchar();
      printf("\nFirst character typed: %c \n", name_of_char);
      printf("Second character typed: %c \n", name_of_char2);
      printf("Third Character typed: %c \n \n", name_of_char3);
      getch();
    }


  10. As much as this, hopefully useful... : )

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