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#include<stdio.h>
#include<conio.h>
#include<math.h>

int main(){
	int decimal1,decimal2,i,z=0,n=0,j,temp=0,carry,decimalEqv=0,y_temp=0,x_temp=0,tempValue=0,y_minus=0;
	int x[20],y[20],c=0,u[20]={0},v[20]={0}, y1=0;
	//ask for decimal number
	printf("\t\tEnter multiplier and multiplicand numbers:");
	scanf("%d%d",&decimal1,&decimal2);
	//change if ngative to positive and flag the number
	if(decimal1<0){
		y_temp=1;
		decimal1=decimal1*(-4);
	}
	if(decimal2<0){
		x_temp=1;
		decimal2=decimal2*(-2);
	}
	while(decimal1>0 || decimal2>0){
		y[n]=decimal1%2;
		decimal1/=2;
		
		x[n]=decimal2%2;
		decimal2/=2;
	
		n++;
	
	}
	printf("\n\t----------------------------------------------------------------------------------------------------\n");
	printf("\t condition \t micro-operation \t\t\t i \t\t  U \t V \t Y \t Y1 \n");
	printf("\n\t----------------------------------------------------------------------------------------------------\n");
	
	printf("\t 1 \t\t U<-0,y1<-0 ,i<%d\t\t",n);
	printf("\t%d \t\t\ ",n);
	
	for(j=1;j>=0;j--){
	printf("%d",u[j]);
}
	printf("\t");
	for(j=1;j>=0;j--){
		printf("%d",v[j]);
	}
	printf("\t");
	for(j=1;j>=0;j--){
		printf("%d",y[j]);
	}
	printf("\t");
	printf("%d \t", y1);
	printf("\n");
	printf("\t ---------------------------------------------------------------------------------------------------");
	printf("\n\n");
	
		y[n]=0;
		x[n]=0;
		i=n;
		//converting to 2's complement if necessary
		if(y_temp){
				carry=1;
				for(j=0;j<=n;j++){
					temp=!y[j]+carry;
					y[j]=temp%2;
					carry=temp/2;
				}
			}
				if(x_temp){
					carry=1;
					for(j=0;j<=n;j++){
					temp=!x[j]+carry;
					x[j]=temp%2;
					carry=temp/2;
				}
			}
			
			do{
			tempValue=y[0]+y_minus;
			if(tempValue==1){
				
				if(y_minus==1){
					printf("\n\t Yo'Y12 \t U<-U+X \n");
						carry=0;
						for(j=0;j<=n;j++){
						temp=u[j]+x[j]+carry;
						u[j]=temp%2;
						carry=temp/2;
				}
		}else{
			printf("\n\t YoY1'2 \t U<-U+X'+1 \n");
					carry=1;	
					for(j=0;j<=n;j++){
					temp=u[j]+!x[j]+carry;
					u[j]=temp%2;
					carry=temp/2;
				}	
			}
		}
		
			i--;
			printf("\n\t 2 \t\t i<-i-1 \t\t\t\t");
			//output formating
			if(i<0)
			   	printf("0 \t\t");
			else
				printf("%d \t\t",i);
			
			for(j=n;j>=0;j--){
				printf("%d",u[j]);
			}
			printf("\t");
				for(j=n;j>=0;j--){
				printf("%d",v[j]);
			}
			printf("\t");
				for(j=n;j>=0;j--){
				printf("%d",y[j]);
			}
			printf("\t%d \t",y1);
			printf("\n\n");
			 if(i<0)
			 	z=1;
			for(j=0;j<n;j++){
			   		v[j]=v[j+1];
			  }
			  v[j]=u[0];
			  for(j=0;j<n;j++){
			   		u[j]=u[j+1];
			   	}
			   	//cir y
			   	y_minus=y[0];
			   	for(j=0;j<n;j++){
			   		y[j]=y[j+1];
			   	}
			   	y[j]=y_minus;
			   	printf("\t 3 \t\t ashr(UV),cir(Y),y1<-yo \t\t");
			   	if(i<0)
			   	 	printf("0 \t\t");
			   	else
					printf("%d \t\t",i);
			  
			  for(j=n;j>=0;j--){
				printf("%d",u[j]);
			}
			printf("\t");
				for(j=n;j>=0;j--){
				printf("%d",v[j]);
			}
			printf("\t");
				for(j=n;j>=0;j--){
				printf("%d",y[j]);
			}
			y1 = y[n];
			printf("\t%d \t",y1);
			printf("\n\n");
			 if(i>=0)
			 printf("\t Z'3 \t\t GOTO 2 \n\n");
			 else
			  printf("\t Z3 \t\t Finish<-1 \n\n");
			  printf("\t ---------------------------------------------------------------------------------------------------");
		}while(z==0);
			   
		printf("\n\tResult in UV = ");
		if(u[n]){
			printf("%d",u[n]);
			decimalEqv-=u[n]*pow(2,2*n+1);
		}
		 for(j=n-1;j>=0;j--){
		 	printf("%d",u[j]);
		 decimalEqv+=u[j]*pow(2,j+n+1);
		 }
		 printf("\t");
		  for(j=n;j>=0;j--){
		 	printf("%d",v[j]);
		 decimalEqv+=v[j]*pow(2,j);
	}
	printf("\n\tThe decimal equivalent of the result = %d",decimalEqv);
	};