#include  <stdio.h>

main()
{
int   fib1, fib2, fib, i, inp;

printf("************************************************");
printf("\n* Welcome to the Fibonacci Number Program v0.1 *\n");
printf("************************************************");
printf("\nWich Fibonacci Number do you want?\n");
scanf("%d", &inp);
fib1 = 1;
fib2 = 0;
switch(inp)
 {
 case 0:
   printf("\n Sorry, no result for f(0)");
   break;
 case 1:
   printf("\n Fib(1) = 0");
   break;
 case 2:
   printf("\n Fib(1) = 0");
   printf("\n Fib(2) = 1");
   break;
 default:
   printf("\n Fib(1) = 0");
   printf("\n Fib(2) = 1");
   for (i=1; i<= inp -2; ++i)
    {
    fib = fib1 + fib2;
    fib2 = fib1;
    fib1 = fib;
    printf("\n Fib(%d) = %d", i + 2, fib);
    }
 }
}

************************************************
* Welcome to the Fibonacci Number Program v0.1 *
************************************************
Wich Fibonacci Number do you want?

Fib(1) = 0
Fib(2) = 1
Fib(3) = 1
Fib(4) = 2
Fib(5) = 3
Fib(6) = 5
Fib(7) = 8
Fib(8) = 13
Fib(9) = 21
Fib(10) = 34
Fib(11) = 55
Fib(12) = 89
Fib(13) = 144
Fib(14) = 233
Fib(15) = 377
Fib(16) = 610
Fib(17) = 987
Fib(18) = 1597
Fib(19) = 2584
Fib(20) = 4181
Fib(21) = 6765
Fib(22) = 10946
Fib(23) = 17711
Fib(24) = 28657
Fib(25) = 46368
Fib(26) = 75025
Fib(27) = 121393
Fib(28) = 196418
Fib(29) = 317811
Fib(30) = 514229
Fib(31) = 832040
Fib(32) = 1346269
Fib(33) = 2178309
Fib(34) = 3524578
Fib(35) = 5702887
Fib(36) = 9227465
Fib(37) = 14930352
Fib(38) = 24157817
Fib(39) = 39088169
Fib(40) = 63245986
Fib(41) = 102334155
Fib(42) = 165580141
Fib(43) = 267914296
Fib(44) = 433494437
Fib(45) = 701408733
Fib(46) = 1134903170
Fib(47) = 1836311903
Fib(48) = -1323752223
Fib(49) = 512559680
Fib(50) = -811192543
Fib(51) = -298632863
Fib(52) = -1109825406
Fib(53) = -1408458269
Fib(54) = 1776683621
Fib(55) = 368225352

#include  <stdio.h>

main()
{
int   i, inp;
float fib1, fib2, fib;

printf("************************************************");
printf("\n* Welcome to the Fibonacci Number Program v0.1 *\n");
printf("************************************************");
printf("\nWich Fibonacci Number do you want?\n");
scanf("%d", &inp);
fib1 = 1;
fib2 = 0;
switch(inp)
 {
 case 0:
   printf("\n Sorry, no result for f(0)");
   break;
 case 1:
   printf("\n Fib(1) = 0");
   break;
 case 2:
   printf("\n Fib(1) = 0");
   printf("\n Fib(2) = 1");
   break;
 default:
   printf("\n Fib(1) = 0");
   printf("\n Fib(2) = 1");
   for (i=3; i<= inp; ++i)
    {
    fib = fib1 + fib2;
    fib2 = fib1;
    fib1 = fib;
    printf("\n Fib(%d) = %.0f", i, fib);
    }
 }
}

************************************************
* Welcome to the Fibonacci Number Program v0.1 *
************************************************
Wich Fibonacci Number do you want?

Fib(1) = 0
Fib(2) = 1
Fib(3) = 1
Fib(4) = 2
Fib(5) = 3
Fib(6) = 5
Fib(7) = 8
Fib(8) = 13
Fib(9) = 21
Fib(10) = 34
Fib(11) = 55
Fib(12) = 89
Fib(13) = 144
Fib(14) = 233
Fib(15) = 377
Fib(16) = 610
Fib(17) = 987
Fib(18) = 1597
Fib(19) = 2584
Fib(20) = 4181
Fib(21) = 6765
Fib(22) = 10946
Fib(23) = 17711
Fib(24) = 28657
Fib(25) = 46368
Fib(26) = 75025
Fib(27) = 121393
Fib(28) = 196418
Fib(29) = 317811
Fib(30) = 514229
Fib(31) = 832040
Fib(32) = 1346269
Fib(33) = 2178309
Fib(34) = 3524578
Fib(35) = 5702887
Fib(36) = 9227465
Fib(37) = 14930352
Fib(38) = 24157816
Fib(39) = 39088168
Fib(40) = 63245984
Fib(41) = 102334152
Fib(42) = 165580128
Fib(43) = 267914272
Fib(44) = 433494400
Fib(45) = 701408640
Fib(46) = 1134903040
Fib(47) = 1836311680
Fib(48) = 2971214848
Fib(49) = 4807526400
Fib(50) = 7778741248
Fib(51) = 12586267648
Fib(52) = 20365008896
Fib(53) = 32951275520
Fib(54) = 53316284416
Fib(55) = 86267559936

#include <stdio.h>
void main()
{
  int a=1,b=1,c,x;
    printf("Enter the number for which fibonacii to be found");
    scanf("%d",&n);
    printf("%d \n %d \n,a,b);
    for(x=1;x<=n-2;x++);
    { c=a+b;
     printf("%d\n",c);
     a=b;
     b=c;
    }
}