fibonacci series in c

1#include<stdio.h>
2
3void fibonacciSeries (int range);
4
5void main()
6{
7   int range;
8
9   printf("Enter range: ");
10   scanf("%d", &range);
11
12   printf("\nThe Fibonacci series is: \n");
13
14   fibonacciSeries(range);
15
16}
17
18void fibonacciSeries(int range)
19{
20   int a=0, b=1, temp;
21
22   while (a<=range)
23   {
24     printf("%d\t", a);
25     temp = a+b;
26     a = b;
27     b = temp;
28   }
29
30}
31

1int main()    
2{    
3 int n1=0,n2=1,n3,i,number;    
4 printf("Enter the number of elements:");    
5 scanf("%d",&number);    
6 printf("\n%d %d",n1,n2);//printing 0 and 1    
7 for(i=2;i<number;++i)//loop starts from 2 because 0 and 1 are already printed    
8 {    
9  n3=n1+n2;    
10  printf(" %d",n3);    
11  n1=n2;    
12  n2=n3;    
13 }  
14  return 0;  
15 }    

1#include <stdio.h>
2int main() {
3    int i, n, t1 = 0, t2 = 1, nextTerm;
4    printf("Enter the number of terms: ");
5    scanf("%d", &n);
6    printf("Fibonacci Series: ");
7
8    for (i = 1; i <= n; ++i) {
9        printf("%d, ", t1);
10        nextTerm = t1 + t2;
11        t1 = t2;
12        t2 = nextTerm;
13    }
14
15    return 0;
16}
17

1#include <stdio.h>
2int main() {
3    int t1 = 0, t2 = 1, nextTerm = 0, n;
4    printf("Enter a positive number: ");
5    scanf("%d", &n);
6
7    // displays the first two terms which is always 0 and 1
8    printf("Fibonacci Series: %d, %d, ", t1, t2);
9    nextTerm = t1 + t2;
10
11    while (nextTerm <= n) {
12        printf("%d, ", nextTerm);
13        t1 = t2;
14        t2 = nextTerm;
15        nextTerm = t1 + t2;
16    }
17
18    return 0;
19}
20

1#include <stdio.h>
2#include <stdlib.h>
3
4int main() {
5	long int a = 1,b = 2, c, d, cont = 0;
6	double e, f;
7	
8	printf("Fibonacci fino a: ");
9	scanf("%ld", &c);
10	
11	while(b < c)
12	{
13		cont ++;
14		printf("\n%ld", b);
15		d = a;
16		a = b;
17		b = b + d;
18	}
19	
20	f = (double)b / (double)a;
21	
22	e = (double)cont / (double)c * (double)100;
23	
24	printf("\n\nOttenuto: %lf\nPercentuale: %lf\n\n\n", f, e);
25	
26	system("pause");
27}