实验三

1.test1

#include <stdlib.h>
#include <time.h>
#include <windows.h>
#define N 80
#include<stdio.h>

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);//暂停1000ms 
    }
    return 0;
}

//打印空格 
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);    
    print_spaces(col-1);
    printf("%s",text);  //在第line行，第col列输出text中的字符串 
}

2.test2

#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!=%11d\n",i,fac(i));
    }
    
    return 0;
}

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

3.test3

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

    return f;
    
}

4.test4

#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;
}
//迭代 
int func(int n,int m){
    int up=1,down=1;
    int q;
    int i=1,j=1;
    if(n<m){
        q=0;
    }
    else if(n>=m){
    
    for(i=n-m+1;i<=n;++i){
        up*=i;
    }
    for(j=1;j<=m;++j){
        down*=j;
    }
}
    q=up/down;
    return q;
}

#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;
}
//递归
int func(int n,int m){
    int f;
    if(n<m) {
        f=0;
    }
    
    else if(m==1) {
        f=n;
    }
     
    else if(m==0) {
        f=1;
    }
    
    else{
    f=func(n-1,m)+func(n-1,m-1);

    }
    return f;

    
        
} 

 5.test5

#include<stdio.h>
#include<stdlib.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;
    int w; 
    while(scanf("%u",&n)!=EOF){
    hanoi(n,'A','B','C');
    w=pow(2,n)-1;
    printf("一共移动了%d次",w);
}
    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 int n,char from,char to){
    printf("%u:%c-->%c\n",n,from,to);
    
}

 6.test6

#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 numberm is:%ld\n\n",t);
        printf("Enter a number:");


    }

    return 0;
}
long func(long s){
    int n,m;
    long long k=0,d=0;

    while(s>0){
        m=s%10;
        if(m%2==0)
            printf(" ");
        else
            k=k*10+m;
        s=s/10;

    }
    while(k>0){
        n=k%10;
        d=d*10+n;
        k=k/10;



    }
    return d;

}