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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

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     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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   • 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

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     4/5

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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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   Learn C Programming. C is one of the foundational programming languages used in the development of compilers, operating systems, and embedded systems where speed and efficiency matter. It is considered the best language to start because it provides a strong understanding of fundamental coding concepts like data types, variables, loops, and ...

3. 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 · Start your coding adventure with our free C Tutorial. A perfect C programming tutorial for beginners and advanced coders alike, this tutorial is your key to unlocking the magic of C programming. With clear explanations and fun examples. C Tutorial. C Basics. C Variables and Constants. C Data Types. C Input and Output.

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

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

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   C ( pronounced / ˈsiː / – like the letter c) [6] is a general-purpose computer 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.

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

   www.w3schools.com › c › index

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   Learn C. C is a general-purpose programming language, developed in 1972, and still quite popular. C is very powerful; it has been used to develop operating systems, databases, applications, etc. Start learning C now »

   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 · Dionysia Lemonaki. This tutorial will give you a broad overview of basic concepts of the C programming language. We'll go over the history of the language, why and where it is used, the compilation process, and some very basic programming concepts that are common in most popular programming languages.

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

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   What is C programming language?

   • What is C? C is a general-purpose, procedural, high-level programming language used in the development of computer software and applications, system programming, games, and more. C language was developed by Dennis M. Ritchie at the Bell Telephone Laboratories in 1972.

   C Tutorial - Learn C Programming Language - GeeksforGeeks

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

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   Why is C a good programming language?

   • C is one of the foundational programming languages used in the development of compilers, operating systems, and embedded systems where speed and efficiency matter. It is considered the best language to start because it provides a strong understanding of fundamental coding concepts like data types, variables, loops, and functions.

   Learn C Programming

   www.programiz.com/c-programming

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   Who invented C programming language?

   • C language was developed by Dennis M. Ritchie at the Bell Telephone Laboratories in 1972. It is a powerful and flexible language which was first developed for the programming of the UNIX operating System. C is one of the most widely used programming languages. C programming language is known for its simplicity and efficiency.

   C Tutorial - Learn C Programming Language - GeeksforGeeks

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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 · In this introductory chapter, you will learn the main characteristics and use cases of the C programming language. You will also learn the basics of C syntax and familiarize yourself with the general structure of all C programs.

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

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

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   Learn about the basics of the C programming language, and write your first C program! 4.4. 2,132 ratings. Start. 33,513 learners enrolled. Skill level. Beginner. Time to complete. <1 hour.