Write a program for pass-II of a two-pass macro-processor. The output of assignment-3 (MNT, MDT and file without any macro definitions) should be input for this assignment

SOFTWARE LABORATORY

First of all we will require ala.txt , mnt.txt , mdt.txt , output.txt generated by macro pass I . Put all this file in same folder where MII.c will be

To see more about mnt.txt , mdt.txt,ala.txt and output.txt visit this link

code for MII.c

#include<stdio.h>
#include<stdlib.h>
#include<string.h>

struct mdtab
{
    char def[40];
}mdt[20];
struct mntab
{
    char name[8];
    int address,argcnt;
}mnt[5];
struct ALA
{
    char formal[10];
    char actual[10];
}ala[20];
int imnt=0,imdt=0,iala=0;

int main()
{
    FILE * fp;
    char buffer[40],s1[10],s2[10],s3[16],s4[16];
    char ap1[8],ap2[8],ap3[8];
    int i,j,k,cnt;
    fp=fopen("mdt.txt","r");
    while(fgets(buffer,40,fp)!=0)
    {
        strcpy(mdt[imdt++].def,buffer);
    }
    fclose(fp);
    fp=fopen("mnt.txt","r");
    while(fgets(buffer,40,fp)!=0)
    {
        sscanf(buffer,"%s%s%s",s1,s2,s3);
        strcpy(mnt[imnt].name,s1);
        mnt[imnt].address=atoi(s2);
        mnt[imnt++].argcnt=atoi(s3);
    }
    fclose(fp);
    fp=fopen("ala.txt","r");
    while(fgets(buffer,40,fp)!=0)
    {
        sscanf(buffer,"%s%s",s1,s2);
        strcpy(ala[iala].formal,s1);
        strcpy(ala[iala++].actual,s2);
    }
    fclose(fp);
   
    fp=fopen("output.txt","r");
    while(fgets(buffer,40,fp)!=0)
    {
        for(j=0;j<strlen(buffer);j++)
                if(buffer[j]==',')
                    buffer[j]=' ';
        sscanf(buffer,"%s%s%s%s",s1,s2,s3,s4);
        i=(s1[1]-65)%5;
        if(strcmp(mnt[i].name,s1)==0)
        {
            //printf("\nMacro call..... %s",buffer);
            i=mnt[i].address;
            sscanf(mdt[i++].def,"%s%s%s%s",s1,s2,s3,s4);
            //printf("\n\t\t %s %d %d %d",s1,atoi(s2),atoi(s3),atoi(s4));
            printf("\n\t %s ",buffer);
            cnt=sscanf(buffer,"%s%s%s%s",s1,ap1,ap2,ap3);
            //printf("\nAfter scan %s %s %s %s",s1,ap1,ap2,ap3);
            if(cnt>1)
                strcpy(ala[atoi(s2)].actual,ap1);
            if(cnt>2)
                strcpy(ala[atoi(s3)].actual,ap2);
            if(cnt>3)
                strcpy(ala[atoi(s4)].actual,ap3);
            while(1)
            {
                sscanf(mdt[i++].def,"%s%s%s",s1,s2,s3);
                if(strcmp(s1,"MEND")==0)
                    break;
                printf("\n\t+%s",s1);
                printf("\t%s\t%s",ala[atoi(s2)].actual,ala[atoi(s3)].actual);
            }
        }
        else
            printf("\n\t %s ",buffer);
    }
    fclose(fp);
    return(0);
}