《C函数大全Pp》.doc

 函数大全(P开头) 函数名: parsfnm 功 能: 分析文件名 用 法: char *parsfnm (char *cmdline, struct fcb *fcbptr, int option); 程序例: #include #include #include #include int main(void) { char line[80]; struct fcb blk; /* get file name */ printf(Enter drive and file name (no path - ie. a:file.dat)\n); gets(line); /* put file name in fcb */ if (parsfnm(line, blk, 1) == NULL) printf(Error in parsfm call\n); else printf(Drive #%d Name: %11s\n, blk.fcb_drive, blk.fcb_name); return 0; } 函数名: peek 功 能: 检查存储单元 用 法: int peek(int segment, unsigned offset); 程序例: #include #include #include int main(void) { int value = 0; printf(The current status of your keyboard is:\n); value = peek(0x0040, 0x0017); if (value 1) printf(Right shift on\n); else printf(Right shift off\n); if (value 2) printf(Left shift on\n); else printf(Left shift off\n); if (value 4) printf(Control key on\n); else printf(Control key off\n); if (value 8) printf(Alt key on\n); else printf(Alt key off\n); if (value 16) printf(Scroll lock on\n); else printf(Scroll lock off\n); if (value 32) printf(Num lock on\n); else printf(Num lock off\n); if (value 64) printf(Caps lock on\n); else printf(Caps lock off\n); return 0; } 函数名: peekb 功 能: 检查存储单元 用 法: char peekb (int segment, unsigned offset); 程序例: #include #include #include int main(void) { int value = 0; printf(The current status of your keyboard is:\n); value = peekb(0x0040, 0x0017); if (value 1) printf(Right shift on\n); else printf(Right shift off\n); if (value 2) printf(Left shift on\n); else printf(Left shift off\n); if (value 4) printf(Control key on\n); else printf(Control key off\n); if (value 8) printf(Alt key on\n); else printf(Alt key off\n); if (value 16) printf(Scroll lock on\n); else printf(Scroll lock off\n); if (value 32) printf(Num lock on\n); else printf(Num lock off\n); if (value 64) printf(Caps lock on\n); else printf(Caps lock off\n); return 0; }