/***************strlen.cpp************/
int Strlen(const char *s)
{int iLen = 0;while (*s!= '\0'){s++;iLen++;}return iLen;}/***************strcpy.cpp************/
//拷贝函数char *Strcpy(char *dest, const char *src)
{char * temp = dest;while (*src != '\0'){*dest = *src;src++;dest++;}return temp;}char *Strncpy(char *dest, const char *src, int n)
{char * temp = dest;while ((*src != '\0')&& (n >0)){*dest = *src;src++;dest++;n--;}return temp;
}/***************strcat.cpp************/
void strcat(char *s, char *t)
{while (*s != '/0'){s++;}while((*s++ = *t++) != '/0');}
/***************strcmp.cpp************/int Strcmp(const char *s1, const char *s2)
{while ((*s1 == *s2)&& (*s1 !='\0')){s1++;s2++;}return *s1 -*s2;}/***************strncmp.cpp************/int Strncmp(const char *s1, const char *s2, int n)
{if (n == 0){return 0;}while ((*s1 == *s2)&& (*s1 !='\0') && ( n-1 > 0 )){s1++;s2++;n--;}return *s1 -*s2;}/***************strend.cpp************/int strend(char *s, char *t)
{char *pTBegin = t;while (*s != '/0'){s++;}while (*t != '/0'){t++;}while (*s==*t){if (t==pTBegin){return 1;}s--;t--;}return 0;}
/***************LTrim.cpp************/char *LTrim(char *str)
{char *p = str;if (str==NULL){return ;}while(*p!='/0'){if ((*p!=' ')&&(*p!='/t')){break;}p++;}if (p == str){return p;}strcpy(str,p);return str;}
/***************RTrim.cpp************/
char *RTrim(char *str)
{int i = strlen(str)- 1;while((i>=0)&&(str[i]==' '||str[i]=='/t')){str[i] = '/0';i--；}return str;}
char *RTrim(char *str)
{int i = strlen(str)- 1;while((i>=0)&&(str[i]==' '||str[i]=='/t')){str[i] = '/0';i--;}return str;}/***************Trim.cpp************/
char *Trim( char *str )
{char *pStr;int i = 0;if ( str == NULL )return NULL;pStr = str;while ( *pStr == ' ' || *pStr == '/t' ) pStr ++;strcpy( str, pStr );i = strlen( str ) - 1;while( (i>=0)&&(str[i] == ' ' || str[i] == '/t') ){str[i] = '/0';i -- ;}return str;
}int main()
{int i = 1;char *p ="abcdefg";char *p2="abcdefh";char *p3="abcdefg";char temp[10] = {0};char temp2[10] = {0};printf("strlen(p)= %d, Strlen(p)= %d\n", strlen(p),Strlen(p));printf("Strcmp(p,p2)= %d\n", Strcmp(p,p2));printf("Strcmp(p2,p3)= %d\n", Strcmp(p2,p3));printf("Strncmp(p2,p3,6)= %d\n", Strncmp(p2,p3,6));printf("Strncmp(p2,p3,7)= %d\n", Strncmp(p2,p3,7));printf("Strncmp(p2,p3,3)= %d\n", Strncmp(p2,p3,3));printf("Strcpy(temp, p2)= %s\n", Strcpy(temp,p2));printf("Strncpy(temp2, p2)= %s\n", Strncpy(temp2,p2,5));
}
