例计算 Fibonacci(斐波拉契)数列 long fib( int n) dif (n>2) return(fib(n-1)+fib(n-2)); else return(1); main O i printf ("%ld \n", fib(6));例 计算Fibonacci(斐波拉契)数列 long fib( int n ) { if (n>2) return (fib(n-1)+fib(n-2)); else return ( 1 ); } main() { printf(" %ld \n",fib( 6 ) ); }