实验3

#define _CRT_SECURE_NO_WARNINGS
#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;
}//打印n个空格

void print_spaces(int n) {
    int i;
    for (i = 1; i <= n; i++)
        printf(" ");
}//打印n行空白行

void print_blank_lines(int n)
{
    int i;
    for (i = 1; i <= n; i++)
        printf("\n");
}//在第line行第col列打印一段文本
void print_text(int line, int col, char text[])
{
    print_blank_lines(line - 1);//打印（line-1）行空格
    print_spaces(col - 1);//打印1（col-1）列空格
    printf("%s", text);//在第line行、col列输出text中字符串


}

实验1：随机弹幕
#define _CRT_SECURE_NO_WARNINGS
//用static计算阶乘
#include<stdio.h>
#include<stdlib.h>
long long fac(int n);
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;}
long long fac(int n){
    static long long p = 1;
    p*= n;
    return p;
}

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>
int func(int, int);
int main() {
    int k = 4, m = 1, p1, p2;
    p1 = func(k, m);
    p2 = func(k, m);
    printf("%d,%d\n", p1, p2);
        return 0;}
int func(int a, int b) {
    static int m = 0, i = 2;
    i += m + 1;
    m = i + a + b;
    return m;}

static:保护后面的变量不因生命周期结束而重置，延续以前的变量
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.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);
}

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.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)
{
    double p = 1, q = 1;
    double conduct = 1;

if (n < m)
        return 0;
    else if ((n- m)==0)
        return 1;
    else if (m == 0)
        return 1;
    else
    {
        q = n ;
        for (p = 1; p <= m; p++)
        {    conduct = conduct * (q / p);
                q--;
        }
        return conduct;
    }



}

 

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.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)
{double p = 1, q = 1;
int t = 0;
    double conduct = 1;
    if (n < m)
        return 0;
    else if ((n - m) == 0)
        return 1;
    else if (m == 0)
        return 1;
    else
        t=func(n-1,m)+func(n-1,m-1);
        
        return t;
    
}

 

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>
void hanoi(unsigned int n, char from, char temp, char to);
void moveplate(unsigned int n, char from, char to);
int count;

int main()
{
    count = 0;
    unsigned n;
    while (scanf("%u", &n) != EOF)
    {
        count = 0;
        hanoi(n, 'A', 'B', 'C');
        printf("%d\n", count);
        system("pause");
    }
    
        return 0;
    
}

void hanoi(unsigned 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(unsigned n, char from, char to)
{
    printf("%u:%c-->%c\n", n, from, to);
    count++;
}

 

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>
long func(long s);
int main()
{
    long s, t;
    printf("Enter a number:");
    while (scanf("%ld", &s) != EOF) {
        t = func(s);
        t = func(t);
        printf("new number is:%ld\n\n",t);
        printf("Enter a number:");
    }
    return 0;
}

long func(long s)
{
    int n = 0;
    int t = 0;
    while (s>0)
    {
        n = s % 10;
        if (n % 2 != 0)
        {   s = s / 10;
            t = t * 10 + n;
        }
        else
            s = s / 10;
    }
    return t;
}

 实验7实在不会搞