c语言字符串操作大全.doc

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1、不错函数名:stpcpy功 能:拷贝一个字符串到另一个用 法:char*stpcpy(char*destin,char*source);程序例:#include#includeintmain(void){  charstring[10];  char*str1="abcdefghi";  stpcpy(string,str1);  printf("%s",string);  return0;}   函数名:strcat功 能:字符串拼接函数用 法:char*strcat(char*destin,char*source);程序例:#includ

2、e#includeintmain(void){  chardestination[25];  char*blank="",*c="C++",*Borland="Borland";  strcpy(destination,Borland);  strcat(destination,blank);  strcat(destination,c);  printf("%s",destination);  return0;}   函数名:strchr功 能:在一个串中查找给定字符的第一个匹配之处用 法:char*strchr(char*str,cha

3、rc);程序例:#include#includeintmain(void) {   charstring[15];   char*ptr,c='r';   strcpy(string,"Thisisastring");   ptr=strchr(string,c);   if(ptr)      printf("Thecharacter%cisatposition:%d",c,ptr-string);   else      printf("Thecharacterwasnotfound");   return0; }   函数名:str

4、cmp功 能:串比较用 法:intstrcmp(char*str1,char*str2);看Asic码，str1>str2，返回值>0；两串相等，返回0程序例:#include#includeintmain(void) {   char*buf1="aaa",*buf2="bbb",*buf3="ccc";   intptr;   ptr=strcmp(buf2,buf1);   if(ptr>0)      printf("buffer2isgreaterthanbuffer1");   else      printf("buffer2i

5、slessthanbuffer1");   ptr=strcmp(buf2,buf3);   if(ptr>0)      printf("buffer2isgreaterthanbuffer3");   else      printf("buffer2islessthanbuffer3");   return0; }   函数名:strncmpi功 能:将一个串中的一部分与另一个串比较,不管大小写用 法:intstrncmpi(char*str1,char*str2,unsignedmaxlen);程序例:#include#include

6、o.h>intmain(void){  char*buf1="BBB",*buf2="bbb";  intptr;  ptr=strcmpi(buf2,buf1);  if(ptr>0)     printf("buffer2isgreaterthanbuffer1");  if(ptr<0)     printf("buffer2islessthanbuffer1");  if(ptr==0)     printf("buffer2equalsbuffer1");  return0;}   函数名:strcpy功 能:串拷贝用 法:char*strcpy(char*st

7、r1,char*str2);程序例:#include#includeintmain(void) {   charstring[10];   char*str1="abcdefghi";   strcpy(string,str1);   printf("%s",string);   return0; }   函数名:strcspn功 能:在串中查找第一个给定字符集内容的段用 法:intstrcspn(char*str