Two Pass Assembler - 2

#include<stdio.h>

#include<string.h>

#include<conio.h>

void main()

{

char *code[9][4]={

{"PRG1","START","",""},

{"","USING","*","15"},

{"","L","",""},

{"","A","",""},

{"","ST","",""},

{"FOUR","DC","F",""},

{"FIVE","DC","F",""},

{"TEMP","DS","1F",""},

{"","END","",""}

};

char av[2],avail[15]={'N','N','N','N','N','N','N','N','N','N','N','N','N','N','N'};

int i,j,k,count[3],lc[9]={0,0,0,0,0,0,0,0,0},loc=0;

clrscr();

printf("----------------------------------------------------\n");

printf("LABEL\t\tOPCODE\n");

printf("----------------------------------------------------\n\n");

for(i=0;i<=8;i++)

{

for(j=0;j<=3;j++)

{

printf("%s\t\t",code[i][j]);

}

j=0;

printf("\n");

}

getch();

printf("-----------------------------------------------------");

printf("\nVALUES FOR LC : \n\n");

for(j=0;j<=8;j++)

{

if((strcmp(code[j][1],"START")!=0)&&(strcmp(code[j][1],"USING")!=0)&&(strcmp(code[j][1],"L")!=0))

lc[j]=lc[j-1]+4;

printf("%d\t",lc[j]);

}

printf("\n\nSYMBOL TABLE:\n----------------------------------------------------\n");

printf("SYMBOL\t\tVALUE\t\tLENGTH\t\tR/A");

printf("\n----------------------------------------------------\n");

           

for(i=0;i< 9;i++)

{

if(strcmp(code[i][1],"START")==0)

{

printf("%s\t\t%d\t\t%d\t\t%c\n",code[i][0],loc,4,'R');

}

else if(strcmp(code[i][0],"")!=0)

{

printf("%s\t\t%d\t\t%d\t\t%c\n",code[i][0],loc,4,'R');

loc=4+loc;

}

else if(strcmp(code[i][1],"USING")==0) {}

else

{

loc=4+loc;

}

}

printf("----------------------------------------------------");

printf("\n\nBASE TABLE:\n-------------------------------------------------------\n");

printf("REG NO\t\tAVAILIBILITY\tCONTENTS OF BASE TABLE");

printf("\n-------------------------------------------------------\n");

for(j=0;j<=8;j++)

{

if(strcmp(code[j][1],"USING")!=0)

{ }

else

{

strcpy(av,code[j][3]);

}

}

count[0]=(int)av[0]-48;

count[1]=(int)av[1]-48;

count[2]=count[0]*10+count[1];

avail[count[2]-1]='Y';

for(k=0;k< 16;k++)

{

printf(" %d\t\t %c\n",k,avail[k-1]);

}

printf("-------------------------------------------------------\n");

printf("Continue..??");

getchar();

printf("PASS2 TABLE:\n\n");

printf("LABEL\t\tOP1\t\tLC\t\t");

printf("\n----------------------------------------------------\n");

loc=0;

for(i=0;i<=8;i++)

{

for(j=0;j<=3;j++)

{

printf("%s\t\t",code[i][j]);

}

j=0;

printf("\n");

}

printf("-----------------------------------------------------");

getch();

}


Output: