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Showing posts with label WAp to know a number is prime or composite or not using function.. Show all posts
Showing posts with label WAp to know a number is prime or composite or not using function.. Show all posts

WAp to know a number is prime or composite or not using function.

turboc++
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//program to know a number is prime or composite or not using function.use no parameter;use return value
#include<stdio.h>                      //header file
#include<conio.h>
int prime_number();                          // function prototype/declaration with return type zero.
int main()                              //main function
{
    int result;
result=prime_number();                                     // function calling.
if(result==0)                        //condition testing
{
    printf("it is prime\n");         //printing output
   
}
else
{
printf("it is not prime\n");
}
getch();
return 0;                                       //returns 0 value
}
int prime_number()                           // function body line ; also called function definition
{
 int i,number,count=0;                    // variable declaration
printf("enter a number\n");               //message display to input a number
scanf("%d",&number);                      //gets input
for(i=2;i<number;i++)                     //executing from 2 to <n
{
    if(number%i==0)                       //testing for next number
    {
        count=1;                        //assigning to  1 to count
 
    }
 

 if(count==0)                                //testing count ;whetehre it has 0 or 1
 {
    return count;                    //returning count
 }
 else
 {
     return;                      //returns nothing
 }
}







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in codeblocks:
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//program to know a number is prime or composite or not using function.use no parameter;use return value
#include<stdio.h>                      //header file
#include<conio.h>
int prime_number();                          // function prototype/declaration with return type zero.
int main()                              //main function
{
    int result;
result=prime_number();                                     // function calling.
if(result==0)                        //condition testing
{
    printf("it is prime\n");         //printing output
   
}
else
{
printf("it is not prime\n");
}
getch();
return 0;                                       //returns 0 value
}
int prime_number()                           // function body line ; also called function definition
{
 int i,number,count=0;                    // variable declaration
printf("enter a number\n");               //message display to input a number
scanf("%d",&number);                      //gets input
for(i=2;i<number;i++)                     //executing from 2 to <n
{
    if(number%i==0)                       //testing for next number
    {
        count=1;                        //assigning to  1 to count
 
    }
 

 if(count==0)                                //testing count ;whetehre it has 0 or 1
 {
    return count;                    //returning count
 }
 else
 {
     return;                      //returns nothing
 }
}