C语言字符串函数大全教程.doc

程序开头要声明#include string.h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 stdio.h#include string.hint main(void){? ?char string[10];? ?char *str1 = abcdefghi;? ?stpcpy(string, str1);? ?printf(%s\n, 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:#include string.h#include stdio.hint 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;}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.hint 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;}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.hint 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;}函数名: strncmpi功??能: 将一个串中的一部分与另一个串比较, 不管???小写用??法: int strncmpi(char *str1, char *str2, unsigned maxlen);程序例:#include string.h#include stdio.hint 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;