The c++ rand () function gives you a number from 0 to RAND_MAX (a constant defined in ), which is at least 32767. () The modulus (%) operator gives the remainder after dividing. When you use it with rand () you are using it to set an upper limit (n) on what the random number can be. For example, lets say you wanted a number between 0 and 4. Calling rand () will give you an answer between 0 and ...
Where is the connection between rand and srand? What I mean or expect is I assume rand () will get some parameter from srand () so it knows to generate different numbers each time. I assume it would look something like rand (srand (time (null)); It's like initializing a variable without using it to me. srand is being initialized, but I don't see it being used. Does rand generate different ...
c - How does srand relate to rand function? - Stack Overflow
Every time you call rand () it takes the seed and/or the last random number (s) generated (the C standard doesn't specify the algorithm used, though C++11 has facilities for specifying some popular algorithms), runs a mathematical operation on those numbers, and returns the result.
The rand() % 2 is a way of generating a pseudo-random number that's either 0 or 1. The rand() function generates a pseudo-random integer. When you take the modulus of that integer by 2 (i.e., rand () % 2), you're essentially asking for the remainder of the division of the random number by 2. Since any number divided by 2 has a remainder of either 0 or 1, rand() % 2 will always result in either ...