By Xavier Pacheco
Meant to capitalize at the developments in the direction of GUI-based program improvement utilizing visible programming instruments, object-oriention and the necessity for info expertise to unravel enterprise difficulties, this ebook isn't for the beginner. fairly, it really is for skilled clients of Delphi or Pascal and people contributors looking an commercial power instrument.
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Additional info for Delphi 2 Developer's Guide
What is the index number of the first element of an array, 0 or 1? 97 CH01 LP#4 1 Day 1 38 Exercises 1. ” on the window when the program runs. 2. Rewrite the program you wrote in exercise 1 and change the displayed text to Hello There! ) 3. Write a Windows console-mode application that outputs This is a test to the screen. 4. Write a Windows console-mode application. In the program, declare two variables and assign values to those variables. Multiply the two numbers together and display the result on the screen.
Although the C way of handling strings is a little quirky, it is by no means obsolete. C++ programmers use C-style string operations on a daily basis as well as string classes such as cstring. I won’t go into examples of all of the string-manipulation functions listed in the table, but I’ll touch on a couple of the more widely used ones. The strcpy() function is used to copy one string to another. The source string can be a variable or a string literal. ”;\ // copy the contents of this string to the first buffer strcpy(buff, buff2); cout << buff << endl; Accidentally overwriting the end of a character array is even easier to do than with the numeric arrays discussed earlier.
This function allows you to build a formatted string by mixing text and numbers together. ” At the end of the format string the variable x is inserted to tell sprintf() what value to put at that location in the string (the contents of the variable x). sprintf() is a unique function in that it can take a variable number of arguments. You must supply the destination buffer and the format string, but the number of arguments that come after the format string is variable. Here is an example of sprintf() that uses three additional arguments: int x = 20; int y = 5; sprintf(buff, “%d + %d = %d”, x, y, x + y); cout << buff; When this piece of code executes, the result displayed on the screen will be this: 20 + 5 = 25 NOTE The single slash is used in strings to indicate special characters.
Delphi 2 Developer's Guide by Xavier Pacheco