Sharp OZ-707 Operation Manual - Page 31

Beginning to Program After all your practice in using the Card as a calculator, you are probably quite at home with the keyboard. From now on, when we show an entry, we will not show every keystroke. Remember to use the I 2nd FIlor ISHIFT I key to access characters above the keys and to end every line by pressing the IENTER I key. Now you are ready to program! To enter program statements into the Card, the Card must first be placed in the PRO (program) mode using thell BASIC II key. "PRO MODE" will be displayed followed by the prompt. Enter the NEW command. I PNREWO MODE ) I Ii The NEW command clears the memory of all existing programs and data. The prompt appears after you press the I ENTER I key, indicating that the Card is awaiting input. Example 1 - Entering and Running a Program Make sure the computer is in the PRO mode and enter the following program: 10PRINT"HELLO" PRO t10DE NEW 10PRItH"HELLO"- Notice that the Card automatically inserts the colon between the number and the command when you press the IENTER I key. Check that the statement is in the correct format and then change the mode to RUN by pressing thell BASIC Ilkey. ICeCE I RUN IENTER I RUt-l HELLO > 50 .----- Since this is the only line of the program, the Card will exit the program and return to the BASIC prompt" > ft. Example 2 - Editing a Program Suppose you wanted to change the message that your program was displaying. That is, you wanted to edit your program. With a single line program you could just retype the entry, but as you develop more complex programs, editing becomes a very Important component of your programming. Let's edit the program you have just written. Are you still in the RUN mode? If so, switch back to the PRO mode. You need to recall your program in order to edit it. Use the up arrow GSJ key to recall your program. If your program was completely executed, the [2SJ key will recall the last line of the program. If there 0 0 was an error in the program, or if you used the key to stop execution, the [2SJ key will recall the line in which the error or break occurred. To make changes in your program, use the [2SJ key to move up in your program (recall the previous line) and the [YJ key to move down in your program (display the next line). If held down, the [2SJ or [YJ key will scroll vertically (up or down) through your program. Remember that to move the cursor within the program line you use the ~ (right arrow) and ~ (left arrow) keys. W USing the key, position the cursor over the first character you wish to change: [2SJ 10:PRINT "HELLO" 10 PRINT "~ELLO" Notice that the cursor is now in the flashing block form, indicating that it is on top of an existing character. Enter: GOODBYE'" 10 EPRn I!N_T "GOODBY 51