Another random number generator C code example using rand() function

 

Compiler: Visual C++ Express Edition 2005

Compiled on Platform: Windows XP Pro SP2

Header file: Standard

Additional library: none/default

Additional project setting: Set project to be compiled as C

Project -> your_project_name Properties -> Configuration Properties -> C/C++ -> Advanced -> Compiled As: Compiled as C Code (/TC)

Other info: none

To do: Another random number generator C program example using rand() function

To show: How to use C rand() function to generate a random number

 

 

// Using rand() function from stdlib.h

#include <stdio.h>

#include <stdlib.h>

 

int main(void)

{

int c, num, num1;

double num3;

 

// generating random number

printf("10 integers random numbers:\n");

 

// loop

for(c = 0; c < 10; c++)

printf("%d ", rand());

 

printf("\n");

 

// num has a value between 0 and 99

num = rand() /100;

printf("\nRandom number less than 100 = %d\n", num);

 

// using lower bound and upper bound

num1 = 200 + (rand()/(700 - 200));

printf("\nRandom number between 200 and 700 = %d\n", num1);

 

// floating-point random numbers...

num3 = rand()/33000.0;

printf("\nfloating-point random number = %f\n", num3);

 

// floating-point random numbers...

printf("\nAnother floating-point random numbers:\n");

for(c = 0; c <10; c++)

printf("%f\n", rand()/33000.0);

 

printf("\n");

return 0;

}

 

Output example:

 

10 integers random numbers:

41 18467 6334 26500 19169 15724 11478 29358 26962 24464

Random number less than 100 = 57

Random number between 200 and 700 = 256

floating-point random number = 0.705485

Another floating-point random numbers:

0.509909

0.301848

0.014879

0.090758

0.361879

0.146273

0.164727

0.981545

0.442545

0.118242

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