How to print connected character in verifone vx520?
问题 I want to draw a line in printed paper like _____ and the picture below is my font bitmap and I use this code to download and select my font to printer and print characters #include <stdlib.h> #include <stdio.h> #include <string.h> #include <svc.h> #include <printer.h> int main() { int retVal; int handle; open_block_t parm; int h_font_file; char print[32] = {43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43}; handle