实验3

实验1

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);
}

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 实验2

2.1.1代码

#include <stdio.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 = p * n;
    
    
    return p;
}

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 代码2.1.2

#include <stdio.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 = p * n;
    printf("p = %lld\n", p);
    
    return p;
}

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 代码2.2

#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;
}

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实验3

代码

#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);
    }

    system("pause");
    return 0;
}


long long func(int n)
{
    long long f = 1;

    if (n == 0)
        f = 0;
    else
        f = func(n-1)*2+1;

    return f;
}

 

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 实验4

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 i,x,c,y,l;
    for(i=n-m+1,x=1;i<=n;++i)
        x=x*i;
   
    for(l=1,y=1;l<=m;++l)
        y=y*l;
    c=x/y;
    return c;
}

 

 

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 实验5

代码

#include <stdio.h>
#include <stdlib.h>

void ta(int n, char from, char temp, char to);
void move(int n, char from, char to);

static int count = 0;

int main()
{
    int n;

    while (scanf("%d",&n) != EOF)
    {
        ta(n, 'A', 'B', 'C');
        printf("Ò»¹²Òƶ¯ÁË%d´Î\n",count);
        count = 0;
    }

    system("pause");
    return 0;
}


void ta(int n, char from, char temp, char to)
{
    if( n == 1 )
    {
        move(n, from, to);
    }
    else
    {
        ta(n-1, from, to, temp);
        move(n, from, to);
        ta(n-1, temp, from, to);
    }
}

void move(int n, char from, char to)
{
    printf("%d: %c --> %c\n", n, from, to);
    ++count;
}

 

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 实验6

代码

#include<stdio.h>
#include<math.h>
long func(long s);

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

    return sum;
}

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