试验3

实验任务1
#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#include<windows.h>
#define N 80

void printText(int line, int col, char text[]);
void printSpaces(int n);
void printBlankLines(int n);

int main()
{
    int line, col, i;
    char text[N] = "hi,May⁓";

    srand(time(0));

    for (i=1; i <= 10; ++i)
    {
        line = rand()%25;
        col = rand()%80;
        printText(line, col, text);
        Sleep(1000);
    }

    return 0;

}
void printSpaces(int n)
{
    int i;

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

    for (i = 1; i <= n; ++i)
        printf("\n");

}

void printText(int line, int col, char text[])
{
    printBlankLines(line - 1);
    printSpaces(col - 1);
    printf("%s", text);
}

 

实验任务2.1
#include <stdio.h>
long long fac(int n);
int main()
{
    int i, n;
    printf("Enter n:");
    scanf_s("%d", &n);
    for (i = 1; i <= n; ++i)
        printf("%d！= %1ld\n", i, fac(i));
    return 0;
}

long long fac(int n)
{
    static long long p = 1;
    printf("p =  %1ld\n", p);
    p = p * n;
    return p;
}

 

实验任务2.1

#include <stdio.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;
}

实验任务3
#include<stdio.h>
long long fun(int n);

int main()
{
    int n;
    long long f;

    while (scanf_s("%d", &n) != EOF)
    {
        f = fun(n);
        printf("n = %d, f = %1ld\n", n, f);

    }
    return 0;
}

long long fun(int n)
{
    int i, s;
    int c = 1;
    for (i = 1; i <= n; i++)
    {
        c = c * 2;
    }
    s = c - 1;
    return s;
}

实验任务4
#include<stdio.h>
void hanoi(unsigned int n, char from, char temp, char to);
void moveplate( unsigned int n, char from,char to );
int main()
{
    unsigned int n;
    while (scanf_s("%u", &n) != EOF)
    {
        int s = 1, i;
        hanoi(n, 'A', 'B', 'C');
        for (i = 2; i <= n; i++)
        {
            s = s * 2 + 1;
        }
        printf("\n一共移动了%d次\n\n", s);

    }
    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 int n, char from, char to)
{
    printf("第%u个盘子:%c-->%c\n", n, from, to);
}

实验任务5
#include<stdio.h>
int is_prime(int i);
int main()
{
    int n;
    for (n = 4; n <= 20; n = n + 2)
    {
        int i, j;
        for (i = 2; i < n; i++) {
            if (is_prime(i) == 1) {
                j = n - i;
                if (is_prime(j) == 1) {
                    printf("%d = %d + %d\n", n, i, j);
                    break;
                }
            }
        }
    }
    return 0;
}
int is_prime(int i)
{
    int j;
    for (j = 2; j < i; j++) {
        if (i % j == 0)
            return 0;
    }
    return 1;
}

实验任务6
#include<stdio.h>
long fun(long s);
int main()
{
    long s, t;
    printf("Enter  anumber:");
    while (scanf_s("%ld", &s) != EOF)
    {
        t = fun(s);
        printf("new number is:%ld\n\n", t);
        printf("Enter  anumber:");
    }
    return 0;
}

long fun(long s)
{
    int d;
    long sl = 1;
    int t = 0;
    while (s > 0)
    {
        d = s % 10;
        if (d % 2 == 1)
        {
            t = d * sl + t;
            sl *= 10;
        }
        s /= 10;
    }
    return t;
}