C语言字符串函数大全.doc

C语言字符串函数大全 1.函数名: strcpy 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 stdio.h #include string.h int main(void) { char string[10]; char *str1 = abcdefghi; strcpy(string, str1); printf(%s\n, string); return 0; } 2.函数名: strcat 功 能: 字符串拼接函数 用 法: char *strcat(char *destin, char *source); 程序例: #include string.h #include stdio.h int main(void) { char destination[25]; char *blank = , *c = C++, *Borland = Borland; strcpy(destination, Borland); strcat(destination, blank); strcat(destination, c); printf(%s\n, destination); return 0; } 3.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 string.h #include stdio.h int main(void) { char string[15]; char *ptr, c = r; strcpy(string, This is a string); ptr = strchr(string, c); if (ptr) printf(The character %c is at position: %d\n, c, ptr-string); else printf(The character was not found\n); return 0; } 4.函数名: strcmp 功 能: 串比较 用 法: int strcmp(char *str1, char *str2); 看Asic码，str1str2，返回值 0；两串相等，返回0 程序例: #include string.h #include stdio.h 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 1\n); else printf(buffer 2 is less than buffer 1\n); ptr = strcmp(buf2, buf3); if (ptr 0) printf(buffer 2 is greater than buffer 3\n); else printf(buffer 2 is less than buffer 3\n); return 0; } 5.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 string.h #include stdio.h int main(void) { char *buf1 = BBB, *buf2 = bbb; int ptr; ptr = strcmpi(buf2, buf1); if (ptr 0) printf(buffer 2 is greater than buffer 1\n); if (ptr 0) printf(buffer 2 is less than buffer 1\n); if (ptr == 0) printf(buffer 2 equals buffer 1\n); return 0; } 6.函数名: strcpy 功 能: 串拷贝 用 法: char *strcpy(char *str1, char *str2); 程序例: #include stdio.h #include string.h int main(void) { char string[10]; char *str1 = abcdefghi; strcpy(string, str1); printf(%s\n, s