C语言案例程序集

Posted 2022-03-17 howard2005

文章目录

• 一、程序控制结构
• • 1、输出斐波拉契数
  • 2、打印杨辉三角形
  • 3、打印乘法九九表
  • 4、百钱买百鸡问题

一、程序控制结构

1、输出斐波拉契数

• 源代码

#include "stdio.h"

int main()

	int i, a, b, c, f[40];

	printf("方法一：利用简单变量进行迭代\\n");
	a = 1;
	b = 1;
	printf("%-8d %-8d ", a, b);

	for (i = 3; i <= 40; i++)
	
		c = a + b;
		printf("%-8d ", c);
		a = b;
		b = c;
		if (i % 5 == 0)
			printf("\\n");
	

	printf("\\n\\n方法二：利用一维数组进行递推\\n");

	f[0] = 1;
	f[1] = 1;
	for (i = 2; i < 40; i++)
	
		f[i] = f[i - 1] + f[i - 2];
	

	for (i = 0; i < 40; i++)
	
		printf("%-8d", f[i]);
		if ((i + 1) % 5 == 0)
			printf("\\n");
	
	return 0;

• 运行结果
  

2、打印杨辉三角形

• 源代码

#include "stdio.h"
int main()

	int i, j, k, m[14][14];

	for (i = 0; i < 14; i++)
	
		for (j = 0; j < 15; j++)
		
			m[i][j] = 1;
		
	

	for (i = 2; i < 14; i++)
	
		for (j = 1; j < i; j++)
		
			m[i][j] = m[i - 1][j - 1] + m[i - 1][j];
		
	

	for (i = 0; i < 14; i++)
	
		for (k = 1; k < 40 - 3 * i; k++)
		
			printf(" ");
		

		for (j = 0; j <= i; j++)
		
			printf("%-5d ", m[i][j]);
		
		printf("\\n");
	
	return 0;

• 运行结果
  

3、打印乘法九九表

• 源代码

#include <stdio.h>

int main()

	int i, j;

	for (i = 1; i <= 9; i++)
	
		for (j = 1; j <= i; j++)
		
			printf("%d×%d=%-2d ", i, j, i * j);
		
		printf("\\n");
	

• 运行结果
  

4、百钱买百鸡问题

• 源代码

#include "stdio.h"
int main()


	int cock, hen, chick, count = 0;

	for (cock = 0; cock <= 20; cock++)
	
		for (hen = 0; hen <= 34; hen++)
		
			for (chick = 0; chick <= 100; chick++)
			
				if (cock + hen + chick == 100 &&
					cock * 5 + hen * 3 + chick / 3.0 == 100)
				
					count++;
					printf("cock = %-2d, hen = %-2d, chick = %-2d \\n", cock, hen, chick);
				
			
		
	
	printf("百钱买百鸡购买方案数：%d\\n", count);

• 运行结果