Most C programmers know the sleep() function, which pauses program execution for a given number of seconds. Seconds are a vast chunk of time, especially in a computer where things happen quickly. So a desire exists for a function that delays execution for smaller slices of time. For that duty you’ll need to code your own function, similar to the delay() function I use.
The delay() function is built upon a C library function called clock().
- Void delay (int time). // this function will create a pause in the runtime process for the number of milliseconds that is given in 'time'. Long pause; clockt time1,time2; // datatype variablename. Pause = time; // if you want to be more accurate replace time with ' time. (CLOCKSPERSEC/1000); ' // i.e.
- Dev-C is a free full-featured integrated development environment (IDE) distributed under the GNU General Public License for programming in C and C.It was originally developed by Colin Laplace and first released in 1998. It is written in Delphi. It is bundled with, and uses, the MinGW or TDM-GCC 64bit port of the GCC as its compiler.Dev-C can also be used in combination with Cygwin.
Delay function is used to hold the program's execution for given. Delay in C: delay function is used to suspend execution of a program for a particular time. Declaration: void delay(unsigned int); Here unsigned int is the number of milliseconds (remember 1. If I have a function which takes a pointer to an integer, and I pass a reference to an integer variable from my main, is this call by value or call by reference? It is call by reference as you are passing reference the address. #include //iostream.h for turbo c, iostream for dev cpp #include using namespace std; void callbyref(int &a,int &b.
The clock() function returns a time value in clock ticks, which is based on the processor’s speed. The value returned is of the clock_t variable type. You can use subsequent reads of the clock() function to determine elapsed time.
The following code demonstrates elapsed time as measured by the clock() function:
Here is the sample output I see on my system:
And the clock() function returned 1072.
And the clock() function returned 1107.
Of course, to make the clock() function useful, it helps to know how many clock ticks take place a second. That information is stored in the CLOCKS_PER_SEC constant.
The above code initializes both clock_t variables to the same value at Line 9. Then a while loop spins until the difference between the values is 1. Here’s the output:
It took 999017 ticks to wait one second.
This value should be the same as CLOCKS_PER_SEC which is 1000000.
Close enough.
Because the CLOCKS_PER_SECOND value could be different on each computer, you need to do some math to figure out how to concoct a delay() function that works on all platforms. Below you see my solution, which uses a millisecond duration as the argument to delay().
At Line 26, the delay() function calculates the pause value in milliseconds (one thousandth of a second). The clock_t variables now and then are initialized at Line 27. Then the while loop waits until the proper number of milliseconds have passed.
Feel free to use the delay() function in your code when a short pause is required.
Hello everyone, In this post, we will learn about the delay() function in C++. There can be many instances when we need to create a delay in our programs. C++ provides us with an easy way to do so. We can use a delay() function for this purpose in our code. This function is imported from the “dos.h” header file in C++. We can run the code after a specific time in C++ using delay() function.
delay() function in C++
Delay Function In Dev C 2b 2b Code
Now let us understand the syntax for delay() function. It is as follows:
void delay(unsigned int milliseconds);
Explanation:
- Here, void suggests that this function returns nothing.
- ‘delay’ is the function name.
- The function takes one parameter which is unsigned integer.
Create a delay in time in a C++ program
The key point to note here is that this delay() function accepts parameter in milliseconds. That is if we want to create a 1-second delay in our program we have to pass 1000 as a parameter to the function.
Example of delay() in C++
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OUTPUT:
Who Is 2b
How it worked:
As you can see in the program, we are taking input from the user ( To know: Taking only integer input in C++ ) and passing it to the delay function after multiplying it with 1000 to convert the seconds into milliseconds.
“dos.h” header file has been included so that a call to delay() function can be made.
NOTE: Your compiler must have dos.h header file in it.
Delay Function In Dev C 2b 2b Programming
Thanks, but how can I use this delay function for e.g. 10 nanosecond?
it is converting the milisecond into the seconds but thank you nice it really helped. To everybody who wants to know google is copy and paced.