弱弱的问题：字符的替换怎么实现？
文件a.txt里是这样的：Thx amazing story of how lxgxndary mastxr winxmakxr, Dr. Richard Pxtxrson, cultivatxd vinxs plantxd in xngland by thx Romans two thousand yxars ago and crxatxd Napa Vallxy's nxwxst, finxst sparkling winx.
所有的e都错打成了x，现在要把x改回来，C程序改如何编?（手工修改就不必了）
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字符
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很简单呀，设置一个指针,如果他的值是e,那么把x赋值给他
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我还没学到指针，麻烦大哥写一下代码。
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char s[1100]={Thx amazing story of how lxgxndary mastxr winxmakxr, Dr. Richard
Pxtxrson, cultivatxd vinxs plantxd in xngland by thx Romans two
thousand yxars ago and crxatxd Napa Vallxy's nxwxst, finxst sparkling
winx.}
for(i=0;i<=
{if(s[i]==''&&s[i+1]=='')判断结束
return -1;
if(s[i]==x)
s[i]=e;
}
printf ......
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