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annas

  • 2 years ago

C program to find prime numbers

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  1. annas
    • 2 years ago
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    #include<stdio.h> #include<conio.h> void main() { int a,b; // initialization of variables clrscr(); // clear screen printf("Enter a Number:"); // display message scanf("%d",&a); //get value printf("\n\nPrime Factors of %d is: ",a); //display message for(b=2;b<=n;b++) //loop { // starting of for loop if(a%b==0) // if a/b and remainder is 0 then { printf("%d,",b); a=a/b; b--; if(a==1) break; } } getche(); }

  2. annas
    • 2 years ago
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    @ParthKohli

  3. ParthKohli
    • 2 years ago
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    Even though I don't understand this, I like it :P Great work! I appreciate it :)

  4. ParthKohli
    • 2 years ago
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    \[\Huge \ddot \smile \]

  5. annas
    • 2 years ago
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    its for finding prime number but in C

  6. ParthKohli
    • 2 years ago
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    Yeah.. I can see that :)

  7. ParthKohli
    • 2 years ago
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    I'm able to read the code a little. If(a%b == 0) means that the modulus of a and b is 0, correct?

  8. ParthKohli
    • 2 years ago
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    More like \(a \text{ mod} b = 0\). == defines checking something.

  9. annas
    • 2 years ago
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    yes but % = remainder operator

  10. ParthKohli
    • 2 years ago
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    Yes, it's the same thing. :) http://www.cprogramming.com/tutorial/modulus.html

  11. annas
    • 2 years ago
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    yap

  12. annas
    • 2 years ago
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    http://pythonism.wordpress.com/2008/05/04/looking-at-prime-numbers-in-python/

  13. annas
    • 2 years ago
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    python programming

  14. ParthKohli
    • 2 years ago
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    So, wish me luck in Python!

  15. ParthKohli
    • 2 years ago
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    Annas dada ki\[\Huge\mathsf{\text{Jai Ho!}} \]

  16. annas
    • 2 years ago
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    lol

  17. anusha.p
    • 2 years ago
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    @annas is this the program to write the prime numbers or the program to find out the prime factors of a number..???

  18. annas
    • 2 years ago
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    @anusha.p its for prime factors of a number thanks for figuring that out :)

  19. anusha.p
    • 2 years ago
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    u didn't declare n annas....aslo..u didn't initialize n...

  20. annas
    • 2 years ago
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    thank you @anusha.p my typo mistake i m sorry lemme correct it

  21. annas
    • 2 years ago
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    first of all prime number program: #include<stdio.h> #include<conio.h> void main() { int n, i = 3, count, c; printf("Enter the number of prime numbers required\n"); scanf("%d",&n); if ( n >= 1 ) { printf("First %d prime numbers are :\n",n); printf("2\n"); } for ( count = 2 ; count <= n ; count++ ) { for ( c = 2 ; c <= i - 1 ; c++ ) { if ( i%c == 0 ) break; } if ( c == i ) { printf("%d\n",i); count++; } i++; } return 0; }

  22. anusha.p
    • 2 years ago
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    also... if(a%b==0) {........... ............. } if(a==1) { .......... ......... } getch(); }

  23. annas
    • 2 years ago
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    #include<stdio.h> #include<conio.h> void main() { int a,b; // initialization of variables clrscr(); // clear screen printf("Enter a Number:"); // display message scanf("%d",&a); //get value printf("\n\nPrime Factors of %d is: ",a); //display message for(b=2;b<=a;b++) //loop { // starting of for loop if(a%b==0) // if a/b and remainder is 0 then { printf("%d,",b); a=a/b; b--; if(a==1) break; } } getche(); } now its ok actually i wrote it in hurry so got some mistakes. and @anusha.p i m very much thankful to you for helping me out :) really appreciated it. @anusha.p brackets are rightly placed :)

  24. anusha.p
    • 2 years ago
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    no mention.......... yeah..braces are at their respective places only....lol.......sorry..

  25. annas
    • 2 years ago
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    oh there is one more mistake : #include<stdio.h> #include<conio.h> void main() { int a,b; // initialization of variables clrscr(); // clear screen printf("Enter a Number:"); // display message scanf("%d",&a); //get value printf("\n\nPrime Factors of %d is: ",a); //display message if(a==1){ break; } else{ for(b=2;b<=a;b++) //loop { // starting of for loop if(a%b==0) // if a/b and remainder is 0 then { printf("%d,",b); a=a/b; b--; } } } getche(); }

  26. annas
    • 2 years ago
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    what i did is i put the if condition where the user gives value

  27. annas
    • 2 years ago
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    thank you once again @anusha.p

  28. annas
    • 2 years ago
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    getch() and getche() are used to get input from the keyboard in character but in getche() it will display character on screen too. here "e" stands for echo

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