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This article shows you C++ programming to generate a specified range of random numbers is what, the content is concise and easy to understand, absolutely can make your eyes bright, through the detailed introduction of this article hope you can get something.

C _ Mini Program:

# include # include

/ * * get random number * return: random number * / int commonGetRandNumber (const int low, const int high) {int randNum = 0

/ / generate random number randNum = rand ()% (high-low + 1) + low

Return randNum;} # define RAND_MAX_LEN (16) # define RAND_MIN_VALUE (0) # define RAND_MAX_VALUE (9999) / * * get the string form of a random number * return: random number string * / std::string commonGetRandString () {int low = RAND_MIN_VALUE

Int high = RAND_MAX_VALUE; int randNum = 0

Char RandArray [RAND _ MAX_LEN] = {0}; std::string randStr

/ / generate random number srand (time (0))

RandNum = commonGetRandNumber (low, high)

Snprintf (randArray, sizeof (randArray)-1, "% d", randNum)

RandStr = randArray; return randStr

}

/ * * get to generate a random string based on a given character array and random number * /

Std::string getNonceStr (int length = 32) {std::string chars = "abcdefghijklmnopqrstuvwxyz0123456789"

Std::string str = ""

/ / generate random number srand (time (0))

For (int I = 0; I < length; iTunes +) {str + = chars.substr (commonGetRandNumber (0, chars.size ()-1), 1)

} return str;} int main () {

/ / get the random number srand (time (0))

Int randNum = commonGetRandNumber (10,100)

Printf ("randNum=%d\ n", randNum)

/ / get the string form of a random number std::string randStr = commonGetRandString ()

Printf ("randStr=%s\ n", randStr.c_str ())

/ / gets to generate a random string std::string randChar = getNonceStr () based on a given character array and random number

Printf ("randChar=%s\ n", randChar.c_str ();}

A call to rand () produces a random number between [0rem 32757], and the absolute value of (high-low) cannot exceed 32767.

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