C语言函数编程

实验1

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#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; 
}

// 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
}
![](https://img2024.cnblogs.com/blog/3405395/202404/3405395-20240427152800453-925934535.png) 在隔着随机行,随机空格,生成10个"hi, April~"

实验2
2.1

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// 利用局部static变量的特性,计算阶乘

#include <stdio.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));

    return 0;
}

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

    return p;
}
![](https://img2024.cnblogs.com/blog/3405395/202404/3405395-20240427153231904-1278967918.png) 增加一行后 ![](https://img2024.cnblogs.com/blog/3405395/202404/3405395-20240427153259795-248579784.png)

2.2

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// 练习:局部static变量特性

#include <stdio.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);

    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;
}
![](https://img2024.cnblogs.com/blog/3405395/202404/3405395-20240427153442250-763741467.png) 一致 存放在static中的东西函数结束时不会消失。且只在函数中使用。

实验3

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

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

    while (scanf("%d", &n) != EOF) {
        f = func(n); // 函数调用
        printf("n = %d, f = %lld\n", n, f);
    }

    return 0;
}

long long func(int n)// 函数定义
{
long long s;
if(n==1)
s=1;
else
s=func(n-1)*2+1;	

return s;

}
![](https://img2024.cnblogs.com/blog/3405395/202404/3405395-20240427154122117-138503998.png)

实验4
4.1

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#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;
}

// 函数定义
int func(int n, int m){
	double s,x,i,y;
	
	if(n<m)
	s=0;
	else if(m==n&&m==0)
	s=1;
	else{
	for(s=1,i=1;i<=m;i++){
	x=(n-m+i)/i;
		s*=x;
	}
	}		
return s;
	
}
// 待补足。。。
![](https://img2024.cnblogs.com/blog/3405395/202404/3405395-20240427154343901-1265130572.png)

4.2

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#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(m>n)
	s=0;
	else if(m==n||m==0)
	s=1;
	else
	 s=func((n-1),m)+func((n-1),(m-1));
	
	return s;
}
![](https://img2024.cnblogs.com/blog/3405395/202404/3405395-20240427154417581-1851657982.png)

实验5

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#include<stdio.h>
#include<stdlib.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=0;
	while(scanf("%u",&n)!=EOF){
		hanoi(n,'A','B','C');
		i=pow(2,n)-1;
	printf("一共移动了%d次\n",i);
	}
	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);

}
![](https://img2024.cnblogs.com/blog/3405395/202404/3405395-20240427154513496-1633747162.png)

实验6

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#include <stdio.h>
#include <math.h>
long func(long s);   // 函数声明

int main() {

    long s, t;

    printf("Enter a number: ");
    while (scanf("%ld", &s) != EOF) {
        t = func(s); // 函数调用
        printf("new number is: %ld\n\n", t);
        printf("Enter a number: ");
    }

    return 0;
}

// 函数定义
long func(long s){
	long ans;
	long digit,t;
	
	ans=0;
	t=1;
	
	while(s!=0){
		digit=s%10;
		
		if(digit%2){
			ans+=t*digit;
			t*=10;
		}
		s/=10;
	}
	return ans;
}
// 待补足。。。
![](https://img2024.cnblogs.com/blog/3405395/202404/3405395-20240427154605609-1583191791.png)
posted @ 2024-04-27 15:46  高羽宏  阅读(6)  评论(0编辑  收藏  举报