字符串處理函數介原型：externintbcmp(constvoid*s1,constvoid*s2,int用法：#includes1s2的前n//#include{char*s2="Goldenglobal printf("s1equaltos2in7bytes");printf("s1notequaltos2in7printf("s1equaltos2in12bytes");printf("s1notequaltos2in12return0;}原型：externvoidbcopy(constvoid*src,void*destint用法：#include//#include{chard[20]; printf("s:printf("d: //bcopyignorenullinstringreturn0;}原型：externvoidbzero(void*s,int用法：#include說明：bzero無返回值。//#include{{inta;floatf;}char //structinitializationtozeroprintf("Initailreturn0;}原型：externvoid y(void*dest,void*src,unsignedcharch,unsignedint用法：#includech則停止NULL。ch被。// #include{chard[20],*p; { printf("Charfound:%s.\n",d);}printf("Charnotreturn0;}原型：externvoid*memchr(void*buf,charch,unsigned用法：#includeNULL//#include{char*p;printf("Notreturn0;} 原型：externintmemcmp(void*buf1,void*buf2,unsignedint用法：#includebuf1和buf2count

當buf1<buf2時，返回值<0當buf1=buf2時，返回值=0當buf1>buf2時，返回值//#include{char*s1="o,Programmers!";char*s2="o,programmers!";intr;printf("s1ands2areidentical");printf("s1lessthans2");printf("s1greaterthanreturn0;}原型：externvoid*memcpy(void*dest,void*src,unsignedint用法：#include功能：由src所指內存區(qū)域count個字節(jié)到dest所指內存區(qū)域。//#include{chard[20];return0;} 原型：externintmemicmp(void*buf1,void*buf2,unsignedint用法：#includebuf1和buf2count個字節(jié)但不區(qū)分字母的大小寫。說明：memicmp同memcmp的唯一區(qū)別是memicmp不區(qū)分大小寫字母。當buf1<buf2時，返回值<0當buf1=buf2時，返回值=0當buf1>buf2時，返回值//#include{char*s1="o,Programmers!";char*s2="o,programmers!";intr;printf("s1ands2areidentical");printf("s1lessthans2");printf("s1greaterthanreturn0;}原型：externvoid*memmove(void*dest,constvoid*src,unsignedint用法：#include//#include{return0;} 原型：externvoid*memset(void*buffer,intc,int用法：#include說明：返回指向buffer的指針。//#include{return0;}原型：extern原型：externvoidmovmem(void*src,void*dest,unsignedint用法：#include//#include{movmem(s,s+7,strlen(s)-s[strlen(s)-return0;}原型：externvoidsetmem(void*buf,unsignedintcount,char用法：#include說明：返回指向buf的指針。//#include{return0;}原型：externchar*stpcpy(char*dest,char用法：#include返回指向dest結尾處字符(NULL)的指針。//#include{chard[20];return0;}原型：externchar*strcat(char*dest,char用法：#include返回指向dest的指針。//#include{char*s="View";return0;}原型：externchar*strchr(char*s,char用法：#include//#include{char*p;printf("Notreturn0;}原型：externintstrcmp(char*s1,char*用法：#include//#include{char*s1="o,Programmers!";char*s2="o,programmers!";intr;printf("s1ands2areidentical");printf("s1lessthans2");printf("s1greaterthanreturn0;}原型：externintstricmp(char*s1,char*用法：#include當s1<s2時，返回值<0//#include{char*s1="o,Programmers!";char*s2="o,programmers!";intr;printf("s1ands2areidentical");printf("s1lessthans2");printf("s1greaterthanreturn0;}原型：externchar*strcpy(char*dest,char用法：#include返回指向dest的指針。//#include{chard[20];return0;} 用法：#include//#include{char*r="new";intn;printf("Thecharbothins1ands2is:return0;}原型：externchar*strdup(char用法：#include//#include{char*d;return0;} 原型：externintstrlen(char用法：#include//#include{printf("%shas%dreturn0;}原型：externchar*strlwr(char用法：#include//#include{return0;}原型：externchar*strncat(char*dest,char*src,int用法：#includesrc所指字符串的前n個字符添加到dest結尾處(覆蓋dest結尾處的'\0')并添加'\0'。//#include{chard[20]="GoldenGlobal";return0;}原型：externintstrcmp(char*s1,char*s2，int用法：#includes1s2的前n個字符。//strncmp.c#include<string.h>{char*s1="o,Programmers!";char*s2="o,programmers!";intr;printf("s1ands2areidentical");printf("s1lessthans2");printf("s1greaterthanprintf("s1ands2areidentical");printf("s1lessthans2");printf("s1greaterthans2");return}原型：externintstrnicmp(char*s1,char*s2，int用法：#includes1s2的前n個字符但不區(qū)分大小寫。說明：strncmpi是到strnicmp的宏定義//#include{char*s1="o,Programmers!";char*s2="o,programmers!";intr;printf("s1ands2areidentical");printf("s1lessthans2");printf("s1greaterthanreturn0;}原型：externchar*strncpy(char*dest,char*src,int用法：#include

srcnNULLNULL字符結束。src和dest所指內存區(qū)域不可以且dest必須有足夠的空間來容納src的字符串。返回指向dest的指針。//#include{char*s="GoldenGlobalchar*d="o,GGVProgrammers";char*p=strdup(s); //enable6linesreturn0;} 原型：externchar*strpbrk(char*s1,char用法：#include//#include{char*s1=" char*s2="BIT";printf("Notprintf("Notreturn0;}原型：externchar*strrev(char用法：#includeNULL//#include{ eTo //6linesperscreenreturn0;}原型：externchar*strset(char*schar用法：#include說明：返回指向s的指針。//#include{return0;}原型：externchar*strstr(char*haystack,char用法：#include說明：返回指向第一次出現needle位置的指針，如果沒找到則返回NULL。//#include{char*l="lob";charprintf("Notreturn0;}