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C++ Random Number Generator Guide
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- Basic Concepts
- Random number generators create pseudo-random numbers for security and anonymity
- Computers cannot generate pure random numbers, so programming languages use PRNGs
- C++ provides rand() and srand() functions for random number generation
- Rand() Function
- Returns random integer between 0 and RAND_MAX (32767)
- Generates random numbers without parameters
- Output remains same without seed value
- Srand() Function
- Initializes random number generator with specified seed value
- Seed value determines randomness of generated numbers
- System time is commonly used as seed value
- Applications
- Used in games like dice and card games
- Essential for cryptography and security purposes
- Helps randomize algorithms for better performance
- Range Generation
- Numbers between 0 and 1 require type casting
- Numbers between 1 and 10 use modulus operator
- Range generation uses offset and modulus syntax