- If we generate a sequence of random number with rand function, it will create the same sequence again and again every time program runs. Say if we are generating 5 random numbers in C with the help of rand in a loop, then every time we compile and run the program our output must be the same sequence of numbers.
- The srand function in C seeds the pseudo random number generator used by the rand function. The seed for rand function is 1 by default. It means that if no srand is called before rand, the rand function behaves as if it was seeded with srand(1).
- How To Generate Random Number In Dev C Download
- How To Generate Random Number In Dev C++ For Copy And Paste
- How To Generate Random Number In Dev C++
How To Generate Random Number In Dev C Download
Oct 27, 2015 3) Using /dev/random The /dev/random special device file can be used to generate random numbers. The idea is simple: The /dev/random uses the noise collected from the device drivers and other sources to generate random data. The od (octal dump) command can extract a number of bytes and displays their decimal equivalent.
- Related Questions & Answers
- Selected Reading
C++Server Side ProgrammingProgramming
Let us see how to generate different random numbers using C++. Here we are generating random numbers in range 0 to some value. (In this program the max value is 100).
To perform this operation we are using the srand() function. This is in the C++ library. The function void srand(unsigned int seed) seeds the random number generator used by the function rand.
The declaration of srand() is like below −
It takes a parameter called seed. This is an integer value to be used as seed by the pseudo-random number generator algorithm. This function returns nothing.
To get the number we need the rand() method. To get the number in range 0 to max, we are using modulus operator to get the remainder.
For the seed value we are providing the time(0) function result into the srand() function.