main.cpp

我做的一些C语言练习题,里面一共有76道题目,主要用到一些计算机常用的算法,如:递归,分治,动态规划,回溯法,AO算法等,除此之外还用到比较多的数学知识,我做了一部分,还有一些暂时还没做出来,大家也帮

/*********************************************************************************

  7. 读入一行文本，包含若干个单词（以空格间隔，％结尾）。将其中以 A 开头的
  单词与以 N 结尾的单词，用头尾交换的办法予以置换。

  例子:
  Never frown even when you are sad because you never know who is falling in love with your smile
  置换后为:
  Never nrowf nvee nhew you era sad because you never know who is falling ni love with your smile

  ********************************************************************************/

#include <stdio.h>

void main()
{
	char *s,*t;
	char str[] = "Never frown even when you are sad because you never know who is falling in love with your smile%";

	s = t = str;
	
	while(*t != '%')
	{
		while(*t == ' ')
			printf("%c",*t++);
		s = t;
		while(*t != ' ' && *t != '%')
			t++;
		if(*s == 'a' || *(t-1) == 'n')
		{
			if(s != t-1)
			{
				char temp;
				temp = *s;
				*s = *(t-1);
				*(t-1) = temp;
			}
		}
		while(s != t)
		{
			printf("%c",*s++);
		}
	}
	printf("\n");
}