To make addition, substraction, multiplication and division Delphi program is not difficult, if we have will to do it. OK, we will start to examine. First, make worksheet form like this below:
Basically, default name of edit text on right side of First number caption is edit1, erdit text on right side of Second number caption is edit2 and edit text on right side of Result is edit3. On this chance, we will change the name, we change edit1 with input1, edit2 with input2 and edit3 with output. Actually, no problem if we use default name without change them, however only to explain that edit1 is function as input1, edit2 is function as input2 and...
