Book Image

Learn C Programming

By : Jeff Szuhay
Book Image

Learn C Programming

By: Jeff Szuhay

Overview of this book

C is a powerful general-purpose programming language that is excellent for beginners to learn. This book will introduce you to computer programming and software development using C. If you're an experienced developer, this book will help you to become familiar with the C programming language. This C programming book takes you through basic programming concepts and shows you how to implement them in C. Throughout the book, you'll create and run programs that make use of one or more C concepts, such as program structure with functions, data types, and conditional statements. You'll also see how to use looping and iteration, arrays, pointers, and strings. As you make progress, you'll cover code documentation, testing and validation methods, basic input/output, and how to write complete programs in C. By the end of the book, you'll have developed basic programming skills in C, that you can apply to other programming languages and will develop a solid foundation for you to advance as a programmer.
Table of Contents (33 chapters)
Section 1: C Fundamentals
Section 2: Complex Data Types
Section 3: Memory Manipulation
Section 4: Input and Output
Section 5: Building Blocks for Larger Programs

Reading string and character input with scanf()

One way to read a string is to use scanf() with the %s specifier. We will also see some other ways of doing this later in this chapter. The %s specifier assigns a sequence of non-whitespace characters to the given array. As with numbers, leading whitespace is skipped. Recall that whitespace can be ' ', '\t', '\n', '\r', '\f', or '\v'. Conversion stops on the first occurrence of whitespace after one or more instances of non-whitespace or at the maximum field width, if specified. Otherwise, the array to which the input string is assigned must be large enough to hold the string plus the terminating NUL character.

The following program demonstrates this effect:

#include <stdio.h>
const int bufferSize = 80;
int main( void ) {
char stringBuffer[ bufferSize ];

printf( "Enter a string: " );
scanf("%s" , stringBuffer );
printf( "Processed...