Nth Fibonacci Number using Command Line Arguments

C Programming Language / Command Line Arguments

526

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Program:

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

int fib(int n)
{
    int a=0,b=1,c,i;
    
    if(n==0) return a;
    for(i=2;i<=n;i++)
    {
        c=a+b;
        a=b;
        b=c;
    }
return b;
}


int main(int argc, char * argv[])
{
    if(argc==1)
    {
        printf("No arguments");
        return 0;
    }
    else
    {
        int n;
        n=atoi(argv[1]);
        printf("%d",fib(n));
    return 0;
    }
}

Output:

10

55

Explanation:

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