main()
{
FILE *f1 ,*f2, *f3 , *f4;
char file1[20],file2[20],file3[20];
printf("Enter source file name:");
scanf("%s",file1);
printf("Enter mnemonics file name:");
scanf("%s",file3);
printf("Enter destination file name:");
scanf("%s",file2);
f1 = fopen(file1 , "r"); //assembly code
f2 = fopen(file3, "r"); //output of pass1
f3 = fopen("opcode.txt", "r"); //nmemonics and registers-opcodes
f4 = fopen(file2, "w"); //final binary output
char ch , sh , c ,e, c1,d;
char arr[17] , arr1[17] , arr2[17] ,arr3[17] ,line1[17],temp[17];
int i=0, j=0 , k=0; int flag =0 , flag1 =0 , line , hexb, l=15;
while(! feof(f1))
{
fscanf(f1 , "%s", arr);
if(strcmp(arr,"0H")==0 || strcmp(arr,"1H")==0 || strcmp(arr,"2H")==0 ||
strcmp(arr,"3H")==0 || strcmp(arr,"4H")==0 || strcmp(arr,"5H")==0 ||
strcmp(arr,"6H")==0 || strcmp(arr,"7H")==0 || strcmp(arr,"8H")==0 ||
strcmp(arr,"9H")==0 || strcmp(arr,"AH")==0 || strcmp(arr,"BH")==0 ||
strcmp(arr,"CH")==0 || strcmp(arr,"DH")==0 || strcmp(arr,"EH")==0 || strcmp(arr,"FH")==0 ){
hexa_to_binary(arr , f4);
}
while(! feof(f3)) //printing opcodes of mnemonics and registers
{
flag = 0;
fscanf(f3 , "%s %s", arr1,temp);
if(strcmp(arr , arr1) == 0)
{
flag =1;
fprintf(f4 , "%s", temp);
break;
}
}
rewind(f3);
if( !strcmp(arr, ";") || !strcmp(arr , ":")) //encounter new line
{
fprintf(f4,"\n");
}
if(flag == 0) //if hexadecimal(address or immediate data) or label
{
while((c = fgetc(f2)) != EOF)
{
if(c == '\n') //conversion of labels to binary
{
flag1=0;
fscanf(f2,"%s %s",arr2,line1);
if(strcmp(arr2 , arr) == 0)
{
flag1 =1;
fprintf(f4,"\n");
conv_binary(line1 ,f4); break;
}
}
}
rewind(f2);
/*if(flag1 ==0) //conv of addresss and immediate data to binary
{
hexa_to_binary(arr , f4);
}*/
}
}
fclose(f1);
fclose(f2);
fclose(f3);
fclose(f4);
}
main()
{
FILE *f1 ,*f2, *f3 , *f4;
f1 = fopen("code4.txt" , "r"); //assembly code
f2 = fopen("pass1.txt", "r"); //output of pass1
f3 = fopen("binary.txt", "r"); //nmemonics and registers-opcodes
f4 = fopen("bin.txt", "w"); //final binary output
char ch , sh , c ,e, c1,d;
char arr[17] , arr1[17] , arr2[17] ,arr3[17] ,line1[17],temp[17];
int i=0, j=0 , k=0; int flag =0 , flag1 =0 , line , hexb, l=15;
while(! feof(f1))
{
fscanf(f1 , "%s", arr);
while(! feof(f3)) //printing opcodes of mnemonics and registers
{
flag = 0;
fscanf(f3 , "%s %s", arr1,temp);
if(strcmp(arr , arr1) == 0)
{
flag =1;
fprintf(f4 , "%s", temp);
break;
}
}
rewind(f3);
if( !strcmp(arr, ";") || !strcmp(arr , ":")) //encounter new line
{
fprintf(f4,"\n");
}
if(flag == 0) //if hexadecimal(address or immediate data) or label
{
while((c = fgetc(f2)) != EOF)
{
if(c == '\n') //conversion of labels to binary
{
flag1=0;
fscanf(f2,"%s %s",arr2,line1);
if(strcmp(arr2 , arr) == 0)
{
flag1 =1;
fprintf(f4,"\n");
conv_binary(line1 ,f4); break;
}
}
}
rewind(f2);
if(flag1 ==0) //conv of addresss and immediate data to binary
{
hexa_to_binary(arr , f4);
}
}
}
fclose(f1);
fclose(f2);
fclose(f3);
fclose(f4);
}
