Code Optimization LEX Program

Compiler Construction Lab Manual / Code Optimization LEX Program

Program Name

Write a Compiler Construction Program for Code Optimization LEX Program.

Theory
Code Optimization LEX Program.

Program Code


#include<stdio.h>
#include<string.h>
main()
{
char stmt[2][20];
int i=0;
char var1,var2;
printf("Enter two C statements\n");
printf("Enter 1st statement\n");
gets(stmt[0]);
printf("Enter 2nd statement\n");
gets(stmt[1]);
var1=stmt[0][0];
var2=stmt[0][2];
while(stmt[1][i++]!='=');
if(stmt[1][i]==var1)
stmt[1][i]=var2;
printf("Optimized code is %s",stmt[1]);
}

Saving: vi codeopt.c

Compiling and Running
cc codeopt.c
./a.out

Input
enter 2 c stmts
enter 1 stmt b=2
enter 2 stmts a=b+c

Output
optimized code is a=2+c

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