函数名: setdta 功 能: 设置磁盘传输区地址 用 法: void setdta(char far *dta); #include #include #include #include int main(void) { char line, far *save_dta; char buffer = "SETDTA test!"; struct fcb blk; int result; /* get new file name from user */ printf("Enter a file name to create:"); gets(line); /* parse the new file name to the dta */ parsfnm(line, &blk, 1); printf("%d %s\n", blk.fcb_drive, blk.fcb_name); /* request DOS services to create file */ if (bdosptr(0x16, &blk, 0) == -1) { perror("Error creating file"); exit(1); } /* save old dta and set new dta */ save_dta = getdta(); setdta(buffer); /* write new records */ blk.fcb_recsize = 256; blk.fcb_random = 0L; result = randbwr(&blk, 1); printf("result = %d\n", result); if (!result) printf("Write OK\n"); else { perror("Disk error"); exit(1); } /* request DOS services to close the file */ if (bdosptr(0x10, &blk, 0) == -1) { perror("Error closing file"); exit(1); } /* reset the old dta */ setdta(save_dta); return 0; }