浙大版《C语言程序设计（第3版）》题目集 习题6-4 使用函数输出指定范围内的Fibonacci数 (20分)

#include <stdio.h>
int fib(int n);
void PrintFN(int m, int n);
int main()
{
    int m, n, t;
    scanf("%d %d %d", &m, &n, &t);
    printf("fib(%d) = %d\n", t, fib(t));
    PrintFN(m, n);
    return 0;
}
int fib(int n)
{
    int a = 1, b = 1, c, i;
    for (i = 1; i < n; i++)
    {
        c = a + b;
        a = b;
        b = c;
    }
    return a;
}
void PrintFN(int m, int n)
{
    int i, flag = 0, t = 1;
    for (i = 1; fib(i) <= n; i++)
    {
        if (fib(i) >= m)
        {
            if (t)
            {
                printf("%d", fib(i));
                t = 0;
                flag = 1;
            }
            else
            {
                printf(" %d", fib(i));
                flag = 1;
            }
        }
    }
    if (flag == 0)
        printf("No Fibonacci number");
}