实验3 C语言函数应用编程

1

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

void print_text(int line, int col, char text[]);  // 函数声明 
void print_spaces(int n);  // 函数声明 
void print_blank_lines(int n); // 函数声明 

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

    srand(time(0)); // 以当前系统时间作为随机种子

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

    return 0;
    system("pause");
}

// 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)行空行 
    print_spaces(col - 1);            // 打印(col-1)列空格
    printf("%s", text);         // 在第line行、col列输出text中字符串
}

在屏幕上间隔一秒打印"hi, April~"

2.

2.1

#include <stdio.h>
#include<stdlib.h>
long long fac(int n); // 函数声明

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;
}

// 函数定义
long long fac(int n) {
	static long long p = 1;

	p = p * n;

	return p;
}

　2.1.1

#include <stdio.h>
#include<stdlib.h>
long long fac(int n); // 函数声明

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;
}

// 函数定义
long long fac(int n) {
    static long long p = 1;
    printf("p=%lld\n",p);
    p = p * n;

    return p;
}

2.2

#include <stdio.h>
#include<stdlib.h>
int func(int, int);        // 函数声明

int main() {
    int k = 4, m = 1, p1, p2;

    p1 = func(k, m);    // 函数调用
    p2 = func(k, m);    // 函数调用
    printf("%d, %d\n", p1, p2);
system("pause");
    return 0;
    
}

// 函数定义
int func(int a, int b) {
    static int m = 0, i = 2;

    i += m + 1;
    m = i + a + b;

    return m;
}

3

#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;
    if (n == 0)
    {
        f = 0;
    }
    if (n >= 1 && n <= 32)
    {
        f = 2 * func(n - 1) + 1;
    }
    return f;
}

 

4

4.1

#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,a=1,b=1,s;
    if(n>m&&m!=0){
        for(i=n-m+1;i<=n;i++)
        a*=i;
    for(i=1;i<=m;i++)
        b*=i;
    s=1.0*a/b;
    }
    if(m>n)
        s=0;
    else if(m==0||m==n)
        s=1;
    
    return s;    
        }    

 

4.2

#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 s;
    
    if(n<m) 
       s=0;
    else if(m==n||m==0)
       s=1;
    else if(m==1)
        s=n;    
      else 
        s=func(n-1,m)+func(n-1,m-1);
    return s;
}

 

 

5

# 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;
    int    i;
    while((scanf("%u",&n)!=EOF))
    {
        hanoi(n,'A','B','C');
        i=pow(2.0,n*1.0)-1;
        printf("一共移动了%d次\n",i);
    }
    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

#include <stdio.h>
#include<stdlib.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: ");
    }
    system("pause");
    return 0;
}
long func(long s){
long n,m=0,i=1;
while(s!=0){
    n=s%10;
    if(n%2!=0){
    m=m+n*i;
    i=i*10;
    }
    s=s/10;}
    return m;
}