代碼

#define _CRT_SECURE_NO_WARNINGS#include <string.h> #include <stdio.h>char string[] = "A string\tof ,,tokens\nand some more tokens"; char seps[] = " ,\t\n"; char *token;int main(void) {printf("Tokens:\n");// Establish string and get the first token:token = strtok(string, seps); // C4996// Note: strtok is deprecated; consider using strtok_s insteadwhile (token != NULL){// While there are tokens in "string"printf(" %s\n", token);// Get next token: token = strtok(NULL, seps); // C4996} }/*int i = -1;do{pDest[++i] = pSource[i];} while (pSource[i]); */ void StringCopy(char* pDest, char* pSource) //微軟源碼 {int i = -1;while (pDest[++i] = pSource[i]); }void StrCopy(char* pDest, char* pSrc) {while(*pDest=*pSrc){++pDest;++pSrc;} }void StrCat(char* pDest,char* pSrc) {int i=0,j=0;while(pDest[i]!=0)++i;while(pDest[i++]=pSrc[j++]); }void StrCat1(char* pDest, char* pSrc) {while (*pDest)++pDest;while (*pDest = *pSrc)++pDest, ++pSrc; }int StrCmp(char* s1, char* s2) {unsigned char* p1 = (unsigned char*)s1;unsigned char* p2 = (unsigned char*)s2;while (*p1 && *p1++ == *p2++);return *p1 - *p2; }

• %p %x %X 區別，%p 更好看
• 指針相減，p1-p2 = 地址之差/sizeof(類型)

運行結果

總結

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