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Programming Fundamentals

Universidad Duke

4.7 (1,407 calificaciones) | 41K estudiantes inscritos

Curso 1 de 4 en Introduction to Programming in C Programa Especializado

Programming is an increasingly important skill, whether you aspire to a career in software development, or in other fields. This course is the first in the specialization Introduction to Programming in C, but its lessons extend to any language you might want to learn. This is because programming is fundamentally about figuring out how to solve a class of problems and writing the algorithm, a clear set of steps to solve any problem in its class. This course will introduce you to a powerful problem-solving process—the Seven Steps—which you can use to solve any programming problem. In this course, you will learn how to develop an algorithm, then progress to reading code and understanding how programming concepts relate to algorithms.

Destrezas que aprenderás

Algorithms, Programming Language Concepts, Problem Solving, C Programming

Revisiones

4.7 (1,407 calificaciones)

5 stars
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4 stars
259 ratings
3 stars
41 ratings
2 stars
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1 star
14 ratings

SS

Apr 21, 2019

I love the focus of this first course in the specialization is about problem solving and developing a mindset for programming. The course is well thought out and concepts are clearly explained!

AM

Apr 08, 2019

Really great course. Took this as a refresher. I feel that the content of this course was significantly higher quality than the programming tuition I received in first semester of university.

De la lección

Reading Code

In this module, you will learn to read code—this means you will be able to execute a piece of code by hand, and clearly illustrate what each statement does and what the state of the program is. Understanding how to read code is the only way to be sure you can write correct code. By the end of this module, you will be able to read and understand code with functions, conditional statements, iteration, and other fundamental techniques.

Printing Example2:52

Impartido por:

Andrew D. Hilton
Associate Professor of the Practice
Genevieve M. Lipp
Assistant Professor of the Practice
Anne Bracy
Senior Lecturer

Transcripción

In this video, we show an example of how you can use the printf function to print output to the terminal. We have our usual frame for main as well as a box for output. And the execution arrow is at the start of main. We begin by declaring and initializing a to 42. Then we reach a printf call. We're going to print the string Hello World. It'll just print this string directly, there are no formats specifies at all. So our output is Hello world. The next printf call with print the string a. Note that this prints the literal letter a since it is enclosed in quotation marks and is therefore a string literal. This has nothing with the variable a. So our output is a. And we return 0 and exit main. What would you do if you wanted to instead print the value of the variable a? The f in printf stands for formatted, and there are several format specifiers you can use to format your output. In this example, first we declare and initialize integers a to 42 and b to 7. Then we reach a printf call with a format specifier. In this case, %d. %d formats integers as decimal numbers. And you'll learn later about other format specifiers. %d means printf will look at the corresponding argument to see what integer format is a decimal number. In this case, it is given variable a. So it prints the decimal representation of the number 42 in the location in the string where the %d is. The next call to printf has two %ds. The first refers to b, the next argument after the string which is 7, and the second of these refers to a + b, which is evaluated like any other expression. So it's 42 + 7 which is 49. So the output is b is 7 and a + b is 49. We return 0 and exit main. Another important thing to know about printf is escape sequences. An escape sequence begins with a backslash. The most common one is \n which means new line. This printf call has two \ns. So you should print two new lines after Hello World. This statement declares and initializes b to 7. This printf call has a \t in it which means a tab, is useful for lining up output. The output is, my answer is tab 7, we return in exit main. This introduction has shown you a few uses of the printf function and you'll see more later in the course.

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