Title : Design suitable data structures and implement Pass 1 of two pass macro-processor
CODE
#include <iostream>
#include <bits/stdc++.h>
using namespace std;
int main(){
vector<string> mdt;
vector<string> mnt;
vector <char> pnt[4];
fstream file;
int pointer=0;
file.open("macro.txt",ios::in);
string s = "",str="";
int c = 0,r=0,a=-1,b=0;
while(getline(file,s)){
if(s=="MACRO"){
b=1;
c=1;
a++;
continue;
}
for(auto it:s){
if(r==1){
int z=0;
for(auto x:pnt[a]){
if(x==it){
z=1;
}
}
if(z==0){
pnt[a].push_back(it);
}
r=0;
}
if(it=='&'){
r=1;}
}
if(b==1){
str="";
int v=0;
char t=s[v];
while(t!=' '){
str=str+t;
v++;
t=s[v];
}
mnt.push_back(str);
b=0;
}
if(c==1){
mdt.push_back(s);
}
if(s=="MEND"){
c=0;
}
}
file.close();
cout<<"MDT"<<endl;
for(auto it:mdt){
cout<<it<<endl;
}
cout<<endl;
for(int i = 0 ; i<=a ; i++){
cout<<"PNT"<<i<<endl;
for(auto it:pnt[i]){
cout<<it<<endl;
}
cout<<endl;
}
cout<<"MNT"<<endl;
for(auto it:mnt){
cout<<it<<endl;
}
return 0;
}Input File : macro.txt
MACRO
ONE &O,&N,&E=AREG
MOVER &E,&O
ADD &E,&N
MOVEM &E,&O
MEND
MACRO
TWO &T,&W,&O=DREG
MOVER &O,&T
ADD &O,&W
MOVEM &O,&T
MEND
START
READ O
READ T
ONE O,9
TWO T,7
STOP
O DS 1
T DS 1
END
OUTPUT :
MDT
ONE &O,&N,&E=AREG
MOVER &E,&O
ADD &E,&N
MOVEM &E,&O
MEND
TWO &T,&W,&O=DREG
MOVER &O,&T
ADD &O,&W
MOVEM &O,&T
MEND
PNT0
O
N
E
PNT1
T
WO
MNT
ONE
TWO