Dev C++ Srand Cannot Be Used As A Function

Dev C Srand Cannot Be Used As A Function Examples
Dev C Srand Cannot Be Used As A Function Definition
Dev C Srand Cannot Be Used As A Function Test

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). If I comment out the line with srand, the program will work, but there is no seed so the values will be the same each time.The assignment requires that I use rand, srand, and time to have the dice function be completely random.

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C library function - srand - The C library function void srand(unsigned int seed) seeds the random number generator used by the function rand. Does that change the scope of that function to where it can only be used in the function it is declared in? Global function definitions must still be at namespace scope, which means that the top-down rule still applies. Anything that comes after the function definition can call it, because the definition also acts as a declaration. Using a dev C compiler, the variable timeperiod appears to be considered a function and I'm not sure why. I know this is simple and appreciate any clear or concise answer, or a track to find as such. Compatibility In C, the generation algorithm used by rand is guaranteed to only be advanced by calls to this function. In C, this constraint is relaxed, and a library implementation is allowed to advance the generator on other circumstances (such as calls to elements of ).

< cpp‎ numeric‎ random

C++

Language
Standard Library Headers
Freestanding and hosted implementations
Named requirements
Language support library
Concepts library(C++20)
Diagnostics library
Utilities library
Strings library
Containers library
Iterators library
Ranges library(C++20)
Algorithms library
Numerics library
Input/output library
Localizations library
Regular expressions library(C++11)
Atomic operations library(C++11)
Thread support library(C++11)
Filesystem library(C++17)
Technical Specifications

Numerics library

Common mathematical functions
Mathematical special functions(C++17)
Mathematical constants(C++20)
Floating-point environment(C++11)
Complex numbers
Numeric arrays
Pseudo-random number generation
Compile-time rational arithmetic(C++11)
Numeric algorithms
(C++17)
(C++17)
Interpolations
(C++20)
(C++20)
Generic numeric operations
(C++11)
(C++17)
(C++17)
(C++17)
(C++17)
(C++17)
(C++17)
Bit operations
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)

Pseudo-random number generation

Uniform random bit generators
(C++20)
Engines and engine adaptors
(C++11)
(C++11)
(C++11)
(C++11)
(C++11)
(C++11)
Non-deterministic generator
(C++11)
Distributions
Uniform distributions
(C++11)
(C++11)
(C++11)
Bernoulli distributions
(C++11)
(C++11)
(C++11)
(C++11)
Poisson distributions
(C++11)
(C++11)
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(C++11)
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Normal distributions
(C++11)
(C++11)
(C++11)
(C++11)
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Sampling distributions
(C++11)
(C++11)
(C++11)
Seed Sequences
(C++11)
C library

std::random_device

Member functions
Generation
Characteristics

Defined in header <random>

(since C++11)

std::random_device is a uniformly-distributed integer random number generator that produces non-deterministic random numbers.

std::random_device may be implemented in terms of an implementation-defined pseudo-random number engine if a non-deterministic source (e.g. a hardware device) is not available to the implementation. In this case each std::random_device object may generate the same number sequence.

2Member functions

[edit]Member types

Member type	Definition
`result_type`	unsignedint

[edit]Member functions

Construction
constructs the engine (public member function)[edit]
(deleted)	the assignment operator is deleted (public member function)
Generation
advances the engine's state and returns the generated value (public member function)[edit]
Characteristics
obtains the entropy estimate for the non-deterministic random number generator (public member function)[edit]
[static]	gets the smallest possible value in the output range (public static member function)[edit]
[static]	gets the largest possible value in the output range (public static member function)[edit]

[edit]Notes

A notable implementation where std::random_device is deterministic is old versions of MinGW (bug 338, fixed since GCC 9.2), although replacement implementations exist, such as mingw-std-random_device. The latest MinGW Versions can be downloaded from GCC with the MCF thread model.