www.pudn.com > 日期、菜单、字符串的C函数.rar > CURBACK.C

/*                       *** curback.c ***                           */ 
/*                                                                   */ 
/* IBM - PC microsoft "C"                                            */ 
/*                                                                   */ 
/* Function to move the cursor backward x relative columns.          */ 
/*                                                                   */ 
/* Written by L. Cuthbertson, March 1984.                            */ 
/*                                                                   */ 
/*********************************************************************/ 
/*                                                                   */ 
 
#define NULL	'\000' 
#define POUND	'#' 
 
curback(x) 
int x; 
{ 
	extern char CUB[]; 
	char xrel[3],command[20]; 
	int i,inpos,outpos; 
 
	/* initialize screen controls */ 
	scrinit(); 
 
	/* convert integer relative motion into string */ 
	sprintf(xrel,"%d",x); 
 
	/* build command line */ 
	inpos = 0;	/* position within control string */ 
	outpos = 0;	/* position within command string */ 
 
	while (CUB[inpos] != POUND) 
		command[outpos++] = CUB[inpos++]; 
 
	for (i=0;xrel[i] != NULL;i++) 
		command[outpos++] = xrel[i]; 
 
	inpos++; 
	while (CUB[inpos] != NULL) 
		command[outpos++] = CUB[inpos++]; 
 
	command[outpos] = NULL; 
 
	/* write command to screen */ 
	writes(command); 
}