Random String Generator. This form allows you to generate random text strings. The randomness comes from atmospheric noise, which for many purposes is better than the pseudo-random number algorithms typically used in computer programs. I'm new to programming in C and have been given the task of creating a 2D array that stores random letters from A-Z using the random function. I know how to do random numbers. Nextvalue = random ( )% 10001; but am unsure on how exactly to create a random character. Random Number Generation C It is often useful to generate random numbers to produce simulations or games (or homework problems:) One way to generate these numbers in C.

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2. C Random Generating 2 Certain Values

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Let us see how to generate random numbers using C++. Here we are generating a random numberin 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-randomnumber 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 usingmodulus operator to get the remainder.

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For the seed value we are providing the time(0) function result into the srand() function.

Example Code

Output 1

Output 2

Output 3

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Description

The C library function int rand(void) returns a pseudo-random number in the range of 0 to RAND_MAX.

RAND_MAX is a constant whose default value may vary between implementations but it is granted to be at least 32767.

Declaration

C Random Generating 2 Certain Values

Following is the declaration for rand() function.

Parameters

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Return Value

This function returns an integer value between 0 and RAND_MAX.

Example

The following example shows the usage of rand() function.

Let us compile and run the above program that will produce the following result −