ing-bottom: 100%;">![c語言的用法總結]( "c語言的用法總結")
隨着經濟的迅速發展以及科學技術水平的不斷提高,計算機技術發展迅速,成爲21世紀的熱門技術,在很大程度上促進生產力水平的提高以及經濟的發展。C語言的發展還在進行着,並且不斷趨於完善,它具有較多的優點。下面小編就爲大家分享下c語言的用法總結。
c語言的用法總結1 函數名: stpcpy 功 能: 拷貝一個字符串到另一個 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"; stpcpy(string, str1); printf("%sn", string); return 0; }
c語言的用法總結2 函數名: strcat 功 能: 字符串拼接函數 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("%sn", destination); return 0; }
c語言的用法總結3 函數名: strchr 功 能: 在一個串中查找給定字符的第一個匹配之處 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: %dn", c, ptr-string); else printf("The character was not foundn"); return 0; }
c語言的用法總結4 函數名: strcmp 功 能: 串比較 用 法: int strcmp(char *str1, char *str2); 看Asic碼，str1>str2，返回值 > 0；兩串相等，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 1n"); else printf("buffer 2 is less than buffer 1n"); ptr = strcmp(buf2, buf3); if (ptr > 0) printf("buffer 2 is greater than buffer 3n"); else printf("buffer 2 is less than buffer 3n"); return 0; }
c語言的用法總結5 函數名: strncmpi 功 能: 將一個串中的一部分與另一個串比較, 不管大小寫 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 1n"); if (ptr < 0) printf("buffer 2 is less than buffer 1n"); if (ptr == 0) printf("buffer 2 equals buffer 1n"); return 0; }
c語言的用法總結6 函數名: strcpy 功 能: 串拷貝 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("%sn", string); return 0; }
c語言的用法總結7 函數名: strcspn 功 能: 在串中查找第一個給定字符集內容的段 用 法: int strcspn(char *str1, char *str2); 程序例: #include <stdio.h> #include <string.h> #include <alloc.h> int main(void) { char *string1 = "1234567890"; char *string2 = "747DC8"; int length; length = strcspn(string1, string2); printf("Character where strings intersect is at position %dn", length); return 0; }
c語言的用法總結8 函數名: strdup 功 能: 將串拷貝到新建的位置處 用 法: char *strdup(char *str); 程序例: #include <stdio.h> #include <string.h> #include <alloc.h> int main(void) { char *dup_str, *string = "abcde"; dup_str = strdup(string); printf("%sn", dup_str); free(dup_str); return 0; }
c語言的用法總結9 函數名: stricmp 功 能: 以大小寫不敏感方式比較兩個串 用 法: int stricmp(char *str1, char *str2); 程序例: #include <string.h> #include <stdio.h> int main(void) { char *buf1 = "BBB", *buf2 = "bbb"; int ptr; ptr = stricmp(buf2, buf1); if (ptr > 0) printf("buffer 2 is greater than buffer 1n"); if (ptr < 0) printf("buffer 2 is less than buffer 1n"); if (ptr == 0) printf("buffer 2 equals buffer 1n"); return 0; }
c語言的用法總結10 函數名: strerror 功 能: 返回指向錯誤信息字符串的指針 用 法: char *strerror(int errnum); 程序例: #include <stdio.h> #include <errno.h> int main(void) { char *buffer; buffer = strerror(errno); printf("Error: %sn", buffer); return 0; }
c語言的用法總結11 函數名: strcmpi 功 能: 將一個串與另一個比較, 不管大小寫 用 法: int strcmpi(char *str1, char *str2); 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 1n"); if (ptr < 0) printf("buffer 2 is less than buffer 1n"); if (ptr == 0) printf("buffer 2 equals buffer 1n"); return 0; }
c語言的用法總結12 函數名: strncmp 功 能: 串比較 用 法: int strncmp(char *str1, char *str2, int maxlen); 程序例: #include <string.h> #include <stdio.h> 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"); ptr = 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); }
c語言的用法總結13 函數名: strncmpi 功 能: 把串中的一部分與另一串中的一部分比較, 不管大小寫 用 法: int strncmpi(char *str1, char *str2); 程序例: #include <string.h> #include <stdio.h> int main(void) { char *buf1 = "BBBccc", *buf2 = "bbbccc"; int ptr; ptr = strncmpi(buf2,buf1,3); if (ptr > 0) printf("buffer 2 is greater than buffer 1n"); if (ptr < 0) printf("buffer 2 is less than buffer 1n"); if (ptr == 0) printf("buffer 2 equals buffer 1n"); return 0; }
c語言的用法總結14 函數名: strncpy 功 能: 串拷貝 用 法: char *strncpy(char *destin, char *source, int maxlen); 程序例: #include <stdio.h> #include <string.h> int main(void) { char string[10]; char *str1 = "abcdefghi"; strncpy(string, str1, 3); string[3] = '
