实验三

#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); 
}
system("pause");
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);
}

#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));
    system("pause");

return 0;
}
long long fac(int n)
{
    static long long p = 1;

    printf("p=%11d\n",p);
    p = p * n;
    return p;
}

#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);
    system("pause");
    return 0;
}

int func(int a, int b)
{
    static int m = 0, i = 2;
    i += m + 1;
    m = i + a + b;

    return m;
}

#include <stdio.h>
#include<stdlib.h>
long long fun(int n); 
int main()
{
    int n;
    long long f;
    while (scanf("%d", &n) != EOF)
    {
        f = fun(n); 
        printf("n = %d, f = %lld\n", n, f);
    }
    system("pause");
    return 0;
}
long long fun(int n)
{   
    if(n==1)
    return 1;
    else
    return fun(n-1)*2+1;
}

#include<stdio.h>
#include<math.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,t;
    while(scanf("%u",&n)!=EOF)
    {
        hanoi(n,'A','B','C');
        t = pow(2,n)-1;
        printf("\n一共移动了%d次.\n\n",t);
    }
    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);
}

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

#include<stdio.h>
#include<math.h>
long fun(long s);
int main() 
{ 
    long s, t;
    printf("Enter a number: "); 
    while (scanf("%ld", &s) != EOF) 
    {  
        t = fun(s);
        printf("new number is: %ld\n\n", t); 
        printf("Enter a number: "); 
    }
return 0; 
}
long fun(long s)
{
    int result=0,i;
    for(int j=0;s!=0;s=s/10)
    {
        i = s%10;
        if(i%2!=0)
        {
            result = i*pow(10,j)+result;
             j = j+1;
        }
    }
    return result;
}