C Program to toss a coin using random function.

Posted on May 7, 2012 by Sandeepa Nadahalli

Write a c program to toss a coin using random function.
In this Program,We use the rand()%2 function that will compute random integers 0 or 1.
Read more about C Programming Language . and read the C Programming Language (2nd Edition). by K and R.

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* programs for commercial purposes,
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#include <stdio.h>
#include <time.h>
#include <stdlib.h>

int main(void) {
    int toss = 0;
    int call = 0;
    srand(time(NULL));
    
    toss = rand() % 2;
    
    printf("Say head or tail! press 0 for head and 1 for tail:nn");
    scanf("%d", &call);
    if(call==0 || call==1)
    {
        if(toss == call)
        {
            if(toss==1)
            printf("You called it correctly ... it is tailn");
            else
            printf("You called it correctly ... it is headn");
        }
        else
        {
            if(toss==1)
            printf("No way ...it is head !n");
            else
            printf("No way ... it is tail!n");
        }
    }
    else
    printf("Invalid call!!!!!nn");
    return 0;
}

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C Program to calculate the total execution time of a program.

Posted on October 13, 2011 by Sandeepa Nadahalli

C Program to calculate the total execution time of a program. Here we used the “time.h” preprocessor. In this program we used the clock_t variables start and end , They starts the time counter and ends the counter. Execution time of a program is useful to calculate the efficiency of the program.
Read more about C Programming Language .

/***********************************************************
* You can use all the programs on  www.c-program-example.com
* for personal and learning purposes. For permissions to use the
* programs for commercial purposes,
* contact [email protected]
* To find more C programs, do visit www.c-program-example.com
* and browse!
* 
*                      Happy Coding
***********************************************************/

#include<stdio.h>
#include<time.h>

int main() 
{
 int i;
 double total_time;
 clock_t start, end;

 start = clock();//time count starts 

 srand(time(NULL));
 for (i = 0; i < 25000; i++) 
 {
  printf("random_number[%d]= %dn", i + 1, rand());
 }
 end = clock();//time count stops 
 total_time = ((double) (end - start)) / CLK_TCK;//calulate total time
 printf("nTime taken to print 25000 random number is: %f", total_time);
 return 0;
}

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C Program to generate random numbers.

Posted on October 12, 2011 by Sandeepa Nadahalli

C Program to generate random numbers. Random Numbers are numbers which are produced by a process and its outcome is unpredictable.The function srand() is used to seed the random sequence. The rand() function shall compute a sequence of pseudo-random integers in the range [0, {RAND_MAX}] with a period of at least 2^32.
Read more about C Programming Language .

/***********************************************************
* You can use all the programs on  www.c-program-example.com
* for personal and learning purposes. For permissions to use the
* programs for commercial purposes,
* contact [email protected]
* To find more C programs, do visit www.c-program-example.com
* and browse!
* 
*                      Happy Coding
***********************************************************/

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

main() {
 int i, num;
 printf("Enter how many random numbers you want?n");
 scanf("%d", &num);
 //The function srand() is used to seed the random sequence. 
 //srand() will generate a specific "random" sequence over and over again. 
 srand(time(NULL));
 //The rand() function shall compute a sequence of pseudo-random 
 //integers in the range [0, {RAND_MAX}]  with a period of at least 2^32.
 for (i = 0; i < num; i++) {
  printf("random_number[%d]= %dn", i + 1, rand());
 }

 printf("A number between 0 and 99: %dn", rand() % 100);

 printf("A number between 0 and 9: %dn", rand() % 10);
 
 return 0;
}

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