C语言全总字符串函数

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1、C 语言全总字符串函数函数名: 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 #include int main(void) char string10; char *str1 = abcdefghi; stpcpy(string, str1); printf(%sn, string); return 0; 函数名: strcat 功 能: 字符串拼接函数 用 法: char *strcat(char *destin, char *source); 程序例: #inclu

2、de #include int main(void) char destination25; char *blank = , *c = C+, *Borland = Borland; strcpy(destination, Borland); strcat(destination, blank); strcat(destination, c); printf(%sn, destination); return 0; 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, char c); 程序例: #include #

3、include int main(void) char string15; char *ptr, c = r; strcpy(string, This is a string); ptr = strchr(string, c); if (ptr) printf(The character %c is at position: %dn, c, ptr-string); else printf(The character was not foundn); return 0; 函数名: strcmp 功 能: 串比较 用 法: int strcmp(char *str1, char *str2);

4、看 Asic 码，str1str2 ，返回值 0；两串相等，返回 0 程序例: #include #include int main(void) char *buf1 = aaa, *buf2 = bbb, *buf3 = ccc; int ptr; ptr = strcmp(buf2, buf1); if (ptr 0) printf(buffer 2 is greater than buffer 1n); else printf(buffer 2 is less than buffer 1n); ptr = strcmp(buf2, buf3); if (ptr 0) printf(buf

5、fer 2 is greater than buffer 3n); else printf(buffer 2 is less than buffer 3n); return 0; 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: int strncmpi(char *str1, char *str2, unsigned maxlen); 程序例: #include #include int main(void) char *buf1 = BBB, *buf2 = bbb; int ptr; ptr = strcmpi(buf2, buf1); i

6、f (ptr 0) printf(buffer 2 is greater than buffer 1n); if (ptr #include int main(void) char string10; char *str1 = abcdefghi; strcpy(string, str1); printf(%sn, string); return 0; 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: int strcspn(char *str1, char *str2); 程序例: #include #include #include int main(voi

7、d) char *string1 = 1234567890; char *string2 = 747DC8; int length; length = strcspn(string1, string2); printf(Character where strings intersect is at position %dn, length); return 0; 函数名: strdup 功 能: 将串拷贝到新建的位置处 用 法: char *strdup(char *str); 程序例: #include #include #include int main(void) char *dup_s

8、tr, *string = abcde; dup_str = strdup(string); printf(%sn, dup_str); free(dup_str); return 0; 函数名: stricmp 功 能: 以大小写不敏感方式比较两个串 用 法: int stricmp(char *str1, char *str2); 程序例: #include #include int main(void) char *buf1 = BBB, *buf2 = bbb; int ptr; ptr = stricmp(buf2, buf1); if (ptr 0) printf(buffer 2

9、 is greater than buffer 1n); if (ptr #include int main(void) char *buffer; buffer = strerror(errno); printf(Error: %sn, buffer); return 0; 函数名: strcmpi 功 能: 将一个串与另一个比较 , 不管大小写 用 法: int strcmpi(char *str1, char *str2); 程序例: #include #include int main(void) char *buf1 = BBB, *buf2 = bbb; int ptr; ptr

10、= strcmpi(buf2, buf1); if (ptr 0) printf(buffer 2 is greater than buffer 1n); if (ptr #include int main(void) char *buf1 = aaabbb, *buf2 = bbbccc, *buf3 = ccc; int ptr; ptr = strncmp(buf2,buf1,3); if (ptr 0) printf(buffer 2 is greater than buffer 1n); else printf(buffer 2 is less than buffer 1n); pt

11、r = strncmp(buf2,buf3,3); if (ptr 0) printf(buffer 2 is greater than buffer 3n); else printf(buffer 2 is less than buffer 3n); return(0); 函数名: strncmpi 功 能: 把串中的一部分与另一串中的一部分比较 , 不管大小写 用 法: int strncmpi(char *str1, char *str2); 程序例: #include #include int main(void) char *buf1 = BBBccc, *buf2 = bbbccc

12、; int ptr; ptr = strncmpi(buf2,buf1,3); if (ptr 0) printf(buffer 2 is greater than buffer 1n); if (ptr #include int main(void) char string10; char *str1 = abcdefghi; strncpy(string, str1, 3); string3 = ; printf(%sn, string); return 0; 函数名: strnicmp 功 能: 不注重大小写地比较两个串 用 法: int strnicmp(char *str1, cha

13、r *str2, unsigned maxlen); 程序例: #include #include int main(void) char *buf1 = BBBccc, *buf2 = bbbccc; int ptr; ptr = strnicmp(buf2, buf1, 3); if (ptr 0) printf(buffer 2 is greater than buffer 1n); if (ptr #include int main(void) char *string = abcdefghijklmnopqrstuvwxyz; char letter = x; printf(stri

14、ng before strnset: %sn, string); strnset(string, letter, 13); printf(string after strnset: %sn, string); return 0; 函数名: strpbrk 功 能: 在串中查找给定字符集中的字符 用 法: char *strpbrk(char *str1, char *str2); 程序例: #include #include int main(void) char *string1 = abcdefghijklmnopqrstuvwxyz; char *string2 = onm; char

15、*ptr; ptr = strpbrk(string1, string2); if (ptr) printf(strpbrk found first character: %cn, *ptr); else printf(strpbrk didnt find character in setn); return 0; 函数名: strrchr 功 能: 在串中查找指定字符的最后一个出现 用 法: char *strrchr(char *str, char c); 程序例: #include #include int main(void) char string15; char *ptr, c = r; strcpy(string, This is a string); ptr = strrchr(string, c); if (ptr) printf(The character %c is at position: %dn, c, ptr-string); else printf(The character was not foundn); return 0; 函数名: strrev 功