²éÕÒ×Ö·û´®ÖÐ×Ö·û²»Öظ´µÄ×î´ó×Ó´®(C/C++)
//ÊäÈë²ÎÊý£º*str ËÑË÷×Ö·û´®
// subStrLen ÓÃÓÚ·µ»ØÕÒµ½µÄ×î´ó×Ó×Ö·û´®³¤¶È
//·µ»Ø£ºÕÒµ½µÄ×î´ó×Ó×Ö·û´®Ö¸Õë
char * findMaxSubStr(char *str, int &subStrLen){
char *subStr;
char *p = str;
int index[256] ;
for (int ix = 0; ix < sizeof(index)/sizeof(index[0]); ix++)
{
index[ix] = -1;
}
int subStrPos = 0; // ×Ó×Ö·û´®ÔÚ×Ö·û´®strÖÐµÄÆ«ÒÆ
int charPos = 0; // µ±Ç°×Ö·ûÔÚ×Ö·û´®strÖÐµÄÆ«ÒÆ
int currLen = 0; //µ±Ç°×Ó×Ö·û´®³¤¶È
int maxLen = 0; //ÒѾÕÒµ½µÄ×î´ó×Ó×Ö·û´®³¤¶È
char ch;
while (ch = *p)
{
if (index[ch] < subStrPos){ //×Ö·ûÊ״γöÏÖ »òÕß ×Ö·ûÔÚ×Ó×Ö·û´®¿ªÊ¼µÄλÖúóÊ״γöÏÖ
index[ch] = charPos;
currLen++;
}else {
currLen = charPos - index[ch];
subStrPos = ++index[ch];
index[ch] = charPos;
}
if (currLen > maxLen)
{
subStr = str + subStrPos;
maxLen = currLen;
}
p++;
charPos++;
}
subStrLen = maxLen;
return subStr;
}
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1.Basic
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#include <stdio.h>
#include <stdlib.h>
int main()
{
int add(int,int);
int def(int, int);
printf("%d\n", add(1,3));
printf("%d\n", def(3,1));
  ......
¡¡¡¡Ëã·¨£¨Algorithm£©£º¼ÆËã»ú½âÌâµÄ»ù±¾Ë¼Ïë·½·¨ºÍ²½Öè¡£Ëã·¨µÄÃèÊö£ºÊǶÔÒª½â¾öÒ»¸öÎÊÌâ»òÒªÍê³ÉÒ»ÏîÈÎÎñËù²ÉÈ¡µÄ·½·¨ºÍ²½ÖèµÄÃèÊö£¬°üÀ¨ÐèҪʲôÊý¾Ý£¨ÊäÈëʲôÊý¾Ý¡¢Êä³öʲô½á¹û£©¡¢²ÉÓÃʲô½á¹¹¡¢Ê¹ÓÃʲôÓï¾äÒÔ¼°ÈçºÎ°²ÅÅÕâЩÓï¾äµÈ¡£Í¨³£Ê¹ÓÃ×ÔÈ»ÓïÑÔ¡¢½á¹¹»¯Á÷³Ìͼ¡¢Î±´úÂëµÈÀ´ÃèÊöËã·¨¡£
¡¡¡¡Ò»¡¢¼ÆÊý¡¢ÇóºÍ¡ ......
1. ʲôÊÇ¿ÕÖ¸Õë³£Á¿£¨null pointer constant£©?
[ 6.3.2.3-3] An integer constant expression with the value 0, or such an expression cast to type void *, is called a null pointer constant.
ÕâÀï¸æËßÎÒÃÇ£º0¡¢0L¡¢'\0'¡¢3 - 3¡¢0 * 17 £¨ËüÃǶ¼ÊÇ“integer constant expression”£©ÒÔ¼° ......
#include <stdio.h>
#include <string.h>
#include <math.h>
#define BASE 10
int intlen(long n);
int main()
{
int i, j, num, sz;
i = j = num = sz = 0;
if (!scanf("%d", &num) || num <= 0) {
printf("invalid input\n");
retu ......
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111
a
a1
b
b1
c
&n ......