Yahoo Web Search

Search results

1. Top results related to c (programming language)

   • 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.

     Check all answers on Stack Overflow

     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(); } -

     Check all answers on Stack Overflow

     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.

     Check all answers on Stack Overflow

     3/5

   • C++ Programming Language

     Check all answers on Geeksforgeeks

     4/5

   • C Programming Language Standard

     Introduction:

     The C programming language has several standard versions, with the most commonly used ones being C89/C90, C99, C11, and C18.

     • C89/C90 (ANSI C or ISO C) was the first standardized version of the language, released in 1989 and 1990, respectively. This standard introduced many of the features that are still used in modern C programming, including data types, control structures, and the standard library.
     • C99 (ISO/IEC 9899:1999) introduced several new features, including variable-length arrays, flexible array members, complex numbers, inline functions, and designated initializers. This standard also includes several new library functions and updates to existing ones.

     Check all answers on Geeksforgeeks

     5/5

   Show moreShow less

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

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

   • Cached

   C Programming at Wikibooks. 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. It has found lasting use in operating ...

   • First appeared: 1972; 51 years ago
   • Stable release: C17, / June 2018; 5 years ago

   • Designed by: Dennis Ritchie

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

   www.geeksforgeeks.org › c-programming-language

   • Cached

   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.

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

   www.programiz.com › c-programming

   • Cached

   • C Introduction. Keywords & Identifier. Variables & Constants. C Data Types. C Input/Output. C Operators. C Introduction Examples.
   • C Flow Control. C if... else. C for Loop. C while Loop. C break and continue. C switch... case. C Programming goto. Control Flow Examples.
   • C Functions. C Programming Functions. C User-defined Functions. C Function Types. C Recursion. C Storage Class. C Function Examples.
   • C Programming Arrays. C Multi-dimensional Arrays. C Arrays & Function.

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

   www.w3schools.com › c › index

   • Cached

   W3Schools offers a comprehensive guide to C, a general-purpose and powerful programming language. You can learn C by examples, exercises, quizzes, and a free "My Learning" program.

   Code sample

   int main() {

     printf("Hello World!");

     return 0;

   }

   See more on w3schools

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

   • Cached

   Jun 30, 2021 · Learn the history, features, and basics of the C programming language, a popular and versatile language for coding. This tutorial covers the history of C, why and where it is used, the compilation process, and some common programming concepts. It is not a complete guide, but a high level overview for beginners to C.

7. People also ask

   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/

   See all results for this question

   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/

   See all results for this question

   Is C a good programming language?

   • 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. Our "Try it Yourself" editor makes it easy to learn C. You can edit code and view the result in your browser: printf ("Hello World!");

   C Tutorial - W3Schools

   www.w3schools.com/c/index.php

   See all results for this question

   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

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

   See all results for this question

8. www.gnu.org › software › gnu-c-manualThe GNU C Reference Manual

   www.gnu.org › software › gnu-c-manual

   • Cached

   This is a reference manual for the C programming language as implemented by the GNU Compiler Collection (GCC). Specifically, this manual aims to document: The 1989 ANSI C standard, commonly known as “C89”. The 1999 ISO C standard, commonly known as “C99”, to the extent that C99 is implemented by GCC. The current state of GNU extensions ...

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

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

   • Cached

   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.