C program create and remove a directory.

dirop.c

#include<stdio.h>
#include<conio.h>
#include<process.h>
#include<dos.h>

void main() {
	int opr, gate = 1;
	union REGS inreg, outreg;
	char dname[20];
	clrscr();
	do {
		printf("\nDirectory Operation\n\nSelect Operation\n");
		printf("\t1 - Create Directory\n\t2 - Delete Directory\n");
		scanf("%i", &opr);
		switch (opr) {
			case 1:
				printf("\n\tCreate Directory\n");
       	printf("\nEnter name of directory : ");
       	scanf("%s", dname);
       	inreg.h.ah = 0x39;
       	inreg.x.dx = (unsigned)dname;
       	int86(0x21, &inreg, &outreg);
       	if(outreg.x.cflag == 0) {
       		printf("\nDirectory Created\n");
       	}
       	else {
       		printf("\nFailed to create directory\n");
       	}
       	break;
      case 2:
      	printf("\n\tRemove Directory\n");
      	printf("\nEnter name of directory : ");
      	scanf("%s", dname);
      	inreg.h.ah = 0x3A;
      	inreg.x.dx = (unsigned)dname;
      	int86(0x21, &inreg, &outreg);
      	if (outreg.x.cflag == 0) {
      		printf("\nDirectory Removed\n");
      	}
      	else {
      		printf("\nFailed to remove directory\n");
      	}
      	break;
      default :
      	printf("\nInvalid Operation\n");
		}
		printf("\nDo you want to continue : 1 or 0 : ");
		scanf("%i". &gate);
	}while(gate);
}