实验三

实验一源代码

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <windows.h>
#define N 80
void print_text(int line, int col, char text[]);
void print_spaces(int n);
void print_blank_lines(int n);
int main() {
    int line, col, i;
    char text[N] = "hi, November~";
    srand(time(0));
        for(i = 1; i <= 10; ++i) {
            line = rand() % 25;
            col = rand() % 80;
            print_text(line, col, text);
            Sleep(1000);
            }
    return 0;
        }

    void print_spaces(int n) {
        int i;
            for(i = 1; i <= n; ++i)
                printf(" ");
        }

    void print_blank_lines(int n) {
        int i;
            for(i = 1; i <= n; ++i)
                printf("\n");
        }

    void print_text(int line, int col, char text[]) {
        print_blank_lines(line-1);
        print_spaces(col-1);
        printf("%s", text);
}

实验一运行结果

 

使其生成随机位置输出文本，同时每十秒输出一次，形成动画效果

 

实验二源代码

#include <stdio.h>
long long fac(int n); // 函数声明
int main() {
    int i, n;
    printf("Enter n: ");
    scanf("%d", &n);
    for (i = 1; i <= n; ++i)
        printf("%d! = %lld\n", i, fac(i));
    return 0;
}
// 函数定义
long long fac(int n) {
    static long long p = 1;
    p = p * n;
    return p;
}

 

实验二运行结果

 

实验2.2源代码

#include <stdio.h>
int func(int, int); // 函数声明
int main() {
    int k = 4, m = 1, p1, p2;
    p1 = func(k, m); // 函数调用
    p2 = func(k, m); // 函数调用
    printf("%d, %d\n", p1, p2);
    return 0;
}
// 函数定义
int func(int a, int b) {
    static int m = 0, i = 2;
    i += m + 1;
    m = i + a + b;
    return m;
}

实验2.2运行结果

实验三源代码

#include <stdio.h>
long long func(int n);
int main() {
    int n;
    long long f;
    while (scanf("%d", &n) != EOF) {
    f = func(n);
    printf("n = %d, f = %lld\n", n, f);
    }
    return 0;
}

long long func(int n) {
    if (n == 0) {
        return 0;
    } else
    {
        return 2 * func(n - 1) + 1;
    }
}

实验三运行结果

实验四源代码

#include <stdio.h>
int func(int n, int m);

int main() {
    int n, m;

    while(scanf("%d%d", &n, &m) != EOF)
        printf("n = %d, m = %d, ans = %d\n", n, m, func(n, m));

    return 0;
}

int func(int n,int m)
{
    int ret = 1;
    int i;
    for (i = 1; i <= n; i++)
        ret = ret * (m - i + 1) / i;
    return ret;
}

实验四运行结果

实验五源代码

#include<stdio.h>
int i = 0;
void hanoi(int n, char from, char temp, char to);
void moveplate(int n, char from, char to);
int main()
{
    unsigned int n;
    while (scanf("%u", &n) != EOF)
    {
        i = 0;
        hanoi(n, 'A', 'B', 'C');
        printf("共移动了%d次\n", i);

    }
    return 0;
}
void hanoi(int n, char from, char temp, char to)
{

    if (n == 1)
        moveplate(n, from, to);
    else
    {
        hanoi(n - 1, from, to, temp);
        moveplate(n, from, to);
        hanoi(n - 1, temp, from, to);
    }

}
void moveplate(int n, char from, char to)
{
    i++;
    printf("%u:%c-->%c\n", n, from, to);
}

实验五运行结果

 

实验六源代码

#include <stdio.h>
#include <math.h>
long func(long s); // 函数声明
int main() {
    long s, t;
    printf("Enter a number: ");

    while (scanf("%ld", &s) != EOF) {
        t = func(s);
        printf("new number is: %ld\n\n", t);
        printf("Enter a number: ");
    }
    return 0;
}

long func(long s) {
    long n = 0;
    long p = 1;

    while (s > 0) {
        long d = s % 10;
        if (d % 2 == 1) {
            n += d * p;
            p *= 10;
        }
        s /= 10;
    }

    return n;
}

实验六运行结果