URDINESH: C Programming samples with out put

PASS ONE OF A TWO PASS ASSEMBLER

#include<stdio.h>

#include<conio.h>

#include<string.h>

void main()

{

char opcode[10],mnemonic[3],operand[10],label[10],code[10];

int locctr,start,length;

FILE *fp1,*fp2,*fp3,*fp4;

clrscr();

printf("\nPass One Of A Two Pass Assembler:");

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

fp1=fopen("input.txt","r");

fp2=fopen("symtb1.txt","w");

fp3=fopen("out.txt","w");

fp4=fopen("optab.txt","r");

fscanf(fp1,"%s%s%s",label,opcode,operand);

if(strcmp(opcode,"START")==0)

{

start=atoi(operand);

locctr=start;

fprintf(fp3,"\t%s\t%s\t%s\n",label,opcode,operand);

fscanf(fp1,"%s%s%s",label,opcode,operand);

}

else

locctr=0;

while(strcmp(opcode,"END")!=0)

{

fprintf(fp3,"%d\t",locctr);

if(strcmp(label,"**")!=0)

fprintf(fp2,"%s\t%d\n",label,locctr);

fscanf(fp4,"%s%s",code,mnemonic);

while(strcmp(code,"END")!=0)

{

if(strcmp(opcode,code)==0)

{

locctr+=3; break;

}

fscanf(fp4,"%s%s",code,mnemonic);

}

if(strcmp(opcode,"WORD")==0)

locctr+=3;

else if(strcmp(opcode,"RESW")==0)

locctr+=(3*(atoi(operand)));

else if(strcmp(opcode,"RESB")==0)

locctr+=(atoi(operand));

else if(strcmp(opcode,"BYTE")==0)

++locctr;

fprintf(fp3,"%s\t%s\t%s\n",label,opcode,operand);

fscanf(fp1,"%s%s%s",label,opcode,operand);

}

fprintf(fp3,"%d\t%s\t%s\t%s\n",locctr,label,opcode,operand);

length=locctr-start;

printf("\nThe Length Of The Program Is...%d",length);

fclose(fp1);

fclose(fp2);

fclose(fp3);

fclose(fp4);

printf("\nProgram Completed Successfully...\n");

getch();

}

OUTPUT:

Pass One Of A Two Pass Assembler:

--------------------------------------------

The Length Of The Program Is...18

Program Completed Successfully...

INPUT FILES:

INPUT.TXT

** START 1000

** LDA VAR1

** MUL VAR2

** STA ANS

VAR1 WORD 11

VAR2 WORD 12

ANS RESW 1

** END **

OPTAB.TXT

START *

ADD 18

DIV 24

LDA 00

LDCH 50

MUL 20

STA 0C

STCH 54

SUB 1C

END *

OUTPUT FILES:

SYMTB1.TXT

VAR1 1009

VAR2 1012

ANS 1015

OUT.TXT

** START 1000

1000 ** LDA VAR1

1003 ** MUL VAR2

1006 ** STA ANS

1009 VAR1 WORD 11

1012 VAR2 WORD 12

1015 ANS RESW 1

1018 ** END **

TOKEN SEPARATION

#include<stdio.h>

#include<conio.h>

#include<stdlib.h>

#include<string.h>

#include<ctype.h>

FILE *fp;

char kw[25][10]={"include","int","void","float","char","if","else","while","switch"};

char optr[15]={'+','-','*','/','%','='};

char sym[20]={'{','}','[',']','.',',','"','<','>',':',';'};

char dt[5][8]={"int","float","char"};

char fname[10],c[10],x,y; int i;

void main()

{

int ch,op;

void display(); void operators();

void constants(); void specialsymbols(); clrscr();

printf("\nToken Separation:\n");

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

printf("Menus:\n\n1.Display Program\n2.Display Keywords\n3.Display Variables\n4.Display Operators\n5.Display Constants\n6.Display Special Symbols\n7.Quit\n\n");

label:

printf("Enter your choice: ");

scanf("%d",&ch);

switch(ch)

{

case 1:

display(); break;

case 2:

printf("\nEnter the file name with extension : ");

scanf("%s",fname);

fp=fopen(fname,"r");

if(fp==NULL) printf("ERROR...");

else

{

fscanf(fp,"%s",&c);

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

{

if(strcmp(c,kw[i])==0) printf("%s ",c);

}

}while(!feof(fp));

}

fclose(fp);

break;

case 3:

printf("\nEnter the file name with extension : ");

scanf("%s",fname);

fp=fopen(fname,"r");

if(fp==NULL) printf("ERROR...");

else

{

fscanf(fp,"%s",&c);

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

{

if(strcmp(c,dt[i])==0)

{

while((x=fgetc(fp))!=';')

printf("%c",x);

break;

}

}while(!feof(fp));

}

fclose(fp);

break;

case 4:

operators(); break;

case 5:

constants(); break;

case 6:

specialsymbols(); break;

case 7:

exit(0); break;

default:

printf("Invalid Option...Try Again...\n"); break;

}

printf("\nDo you want to continue (1/0): ");

scanf("%d",&op);

if(op==1)

goto label;

else

exit(0);

getch();

}

void display()

{

printf("\nEnter the file name with extension : ");

scanf("%s",fname);

fp=fopen(fname,"r");

if(fp==NULL) printf("ERROR...");

else

{

fscanf(fp,"%c",&y);

while(!feof(fp))

{

printf("%c",y); fscanf(fp,"%c",&y);

}

fclose(fp);

}

void operators()

{

printf("\nEnter the file name with extension : ");

scanf("%s",fname);

fp=fopen(fname,"r");

if(fp==NULL) printf("ERROR...");

else

{

while(fread(&y,sizeof(char),1,fp))

{

for(i=0;i<6;i++)

if(y==optr[i]) printf("%c,",y);

}

fclose(fp);

}

void constants()

{

printf("\nEnter the file name with extension : ");

scanf("%s",fname);

fp=fopen(fname,"r");

if(fp==NULL) printf("ERROR...");

else

{

while(fread(&y,sizeof(char),1,fp))

{

if(isdigit(y)) printf("%c,",y);

}

fclose(fp);

}

void specialsymbols()

{

printf("\nEnter the file name with extension : ");

scanf("%s",fname);

fp=fopen(fname,"r");

if(fp==NULL) printf("ERROR...");

else

{

while(fread(&y,sizeof(char),1,fp))

{

for(i=0;i<11;i++)

if(y==sym[i]) printf("%c,",y);

}

fclose(fp);

}

OUTPUT:

Token Separation:

-----------------------

Menus:

1.Display Program

2.Display Keywords

3.Display Variables

4.Display Operators

5.Display Constants

6.Display Special Symbols

7.Quit

Enter your choice: 1

Enter the file name with extension : add.c

//Addition

#include<stdio.h>

#include<conio.h>

void main()

{

int c; float x,y; char s[10],a;

clrscr();

c=123+456;

printf("Added value is...%d",c);

getch();

}