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   • programming C language temperature conversion

     Top Answer

     Answered Aug 06, 2014 · 3 votes

     The %s format specifier is for null-terminated strings only (which have type char*), not single characters (char). For single characters, use %c.

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     1/5

   • Programming a XM1000 Sensor Device in C Programming Language Need if statement

     Top Answer

     Answered Apr 25, 2016 · 0 votes

     Here's what I think it will look like, give or take a little hacking. I've structured the code as a single loop, that just polls all three sensors at 5 second intervals. So every 5 seconds, the on/off status of all three lights might change. I figure for watering a lawn, you don't really need split-second precision in terms of knowing when it got hot, or dark, or whatever.

     Based on your replies in the comments section of the OP, there might have to be some computation done involving the return values of the sensor readings. I figure it's probably easier to do the computation at compile time, so the code is biased that way.

     #include <stdio.h> /* for printf() */ -#include "contiki.h" #include "leds.h"#include "dev/light-sensor.h"#include "dev/sht11-sensor.h"-PROCESS(Led_management_process, "LED Management Process"); AUTOSTART_PROCESSES(&Led_management_process); -static struct etimer Timer; -/* Per the online docs at http://www.advanticsys.com/wiki/index.php?title=TestCM5000- T = -39.6 + 0.01 × SO(T)-So, solving for SOt gives:*/#define degreesC(n) (n)-#define TEMP_D1 degreesC(-39.6)#define TEMP_D2 degreesC(0.01)#define TEMP_THRESHOLD(tempC) (int)(((((double)(tempC))-(TEMP_D1))/(TEMP_D2)))-#define TARGET_TEMP_READING TEMP_THRESHOLD(degreesC(26))-#define LIGHT_LED LEDS_GREEN#define HUM_LED LEDS_BLUE#define TEMP_LED LEDS_RED-PROCESS_THREAD(Led_management_process, ev, data) { static int humidity_led_on = 0; static int light_led_on = 0; static int temp_led_on = 0;- PROCESS_BEGIN(); SENSORS_ACTIVATE(light_sensor); SENSORS_ACTIVATE(sht11_sensor); leds_init();- unsigned int cycle = 0;- while (1) { printf("%8u:", cycle);- /* This part is questionable, since I don't know if the sensors are guaranteed to return ints (vs. floats or something) and I don't know what units they use. */ int temp = sht11_sensor.value(SHT11_SENSOR_TEMP);- if (temp > TARGET_TEMP_READING) { printf(" TEMP warm- "); if (!temp_led_on) { printf("toggle LED"); temp_led_on = 1; leds_toggle(TEMP_LED); } else { printf("LED is ok "); } } else { printf(" TEMP cold- "); if (temp_led_on) { printf("toggle LED"); temp_led_on = 0; leds_toggle(TEMP_LED); } else { printf("LED is ok "); } }- /* Code for humidity */ /* Code for light */- printf("\n");- /* Sleep 5 seconds */ etimer_set(&Timer, CLOCK_CONF_SECOND * 5); PROCESS_WAIT_EVENT_UNTIL(ev==PROCESS_EVENT_TIMER); etimer_reset(&Timer); ++cycle; }- PROCESS_END(); } -

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     2/5

   • Programming language C

     Top Answer

     Answered Feb 07, 2016 · 2 votes

     The arrays are passed by pointers (the way references are used in C). So when the data is modified in the body of the function, the calling function can access the modified data.

     After the function is executed all the variables must be lost and nothing must be saved in from array after function is executed.

     True, objects that have liftetimes within the lifetime of the function will be lost when the function exists. However the function's lifetime has no effect on objects that have existed before it or after it.

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     3/5

   • C Programming Language Cheat Sheet

     This C Cheat Sheet provides an overview of both basic and advanced concepts of the C language. Whether you’re a beginner or an experienced programmer, this cheat sheet will help you revise and quickly go through the core principles of the C language.

     In this Cheat Sheet, we will delve into the basics of the C language, exploring its fundamental concepts that lay the groundwork for programming. We will cover topics such as variables, data types, and operators, providing you with a solid understanding of the building blocks of C programming.

     Basic Syntax

     Consider the below Hello World program:

     C

     // C Hello World program #include <stdio.h>   int main() {     printf("Hello World!");     return 0; }-

     Output

     Hello World!

     Here,

     • #include <stdio.h>: The header file inclusion to use printf() function.
     • int main(): The main() function is the entry point of any C program.
     • printf(“Hello World”): Function to print hello world.

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     4/5

   • Also try

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2. www.programiz.com › c-programmingLearn C Programming - Programiz: Learn to Code for Free

   www.programiz.com › c-programming

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   Programiz offers free and premium C programming tutorials, courses, and references to help you learn C. C is a foundational language for compilers, operating systems, and embedded systems where speed and efficiency matter.

3. en.wikipedia.org › wiki › C_(programming_language)C (programming language) - Wikipedia

   en.wikipedia.org › wiki › C_(programming_language)

   • Cached

   C (pronounced / ˈ s iː / – like the letter c) is a general-purpose programming language. It was created in the 1970s by Dennis Ritchie and remains very widely used and influential. By design, C's features cleanly reflect the capabilities of the targeted CPUs.

4. www.geeksforgeeks.org › c-programming-languageC Tutorial - Learn C Programming Language - GeeksforGeeks

   www.geeksforgeeks.org › c-programming-language

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   Mar 11, 2024 · Learn C programming basic to advanced concepts with clear explanations and fun examples. This tutorial covers topics like variables, data types, operators, control statements, functions, arrays, pointers, structures, memory management, preprocessor, file handling, error handling and more.

5. www.w3schools.com › c › indexC Tutorial - W3Schools

   www.w3schools.com › c › index

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   W3Schools offers a comprehensive and interactive C tutorial, with examples, exercises, quizzes and a free learning tracker. C is a general-purpose programming language, developed in 1972, and still quite popular.

   Code sample

   int main() {

     printf("Hello World!");

     return 0;

   }

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6. www.freecodecamp.org › news › what-is-the-cWhat is The C Programming Language? A Tutorial for Beginners

   www.freecodecamp.org › news › what-is-the-c

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   Jun 30, 2021 · Learn the basics of C programming language, its history, characteristics, and applications. This tutorial covers syntax, variables, data types, functions, loops, and more.

7. People also ask

   What is a C programming tutorial?

   • In this C Tutorial, you’ll learn all C programming basic to advanced concepts like variables, arrays, pointers, strings, loops, etc. This C Programming Tutorial is designed for both beginners as well as experienced professionals, who’re looking to learn and enhance their knowledge of the C programming language. What is C?

   C Tutorial - Learn C Programming Language - GeeksforGeeks

   www.geeksforgeeks.org/c-programming-language/

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   Is C a programming language?

   • And languages such as C++ and C# are extensions of C and provide additional functionality. Even though C was originally designed with systems programming in mind, it is widely used in many other areas of computing. C programs are portable and easy to implement, meaning they can be executed across different platforms with minimal changes.

   The C Programming Handbook for Beginners - freeCodeCamp.org

   www.freecodecamp.org/news/the-c-programming-handbook-for-beginners/

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   What is the history of C programming language?

   • The history of the C programming language is closely tied to the history of the development of the Unix Operating System. If we look back to understand what led to the development of the operating system that changed the world of computing, we'll see the steps that led to the development of C.

   What is The C Programming Language? A Tutorial for Beginners

   www.freecodecamp.org/news/what-is-the-c-programming-language-beginner-tutorial/

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   What are the features of C language?

   • Portable: C provides the feature that you write code once and run it anywhere on any computer. It shows the machine-independent nature of the C language. Pointers: C comes with pointers. Through pointers, we can directly access or interact with the memory. We can initialize a pointer as an array, variables, etc.

   C Tutorial - Learn C Programming Language - GeeksforGeeks

   www.geeksforgeeks.org/c-programming-language/

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8. www.freecodecamp.org › news › the-c-programmingThe C Programming Handbook for Beginners - freeCodeCamp.org

   www.freecodecamp.org › news › the-c-programming

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   Aug 29, 2023 · Learn C programming fundamentals with this handbook written for beginners. It covers the basics of C syntax, data types, operators, control flow, arrays, strings, and more.

9. www.codecademy.com › learn › learn-c-introductionLearn C: Introduction | Codecademy

   www.codecademy.com › learn › learn-c-introduction

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   Start your journey into the C programming language with this beginner-friendly course. Learn about the basics of C, write your first C program, and get hands-on practice with AI-assisted learning and quizzes.