compiler compiler design compiler design lab

1. Compiler design lab
ILIAS AHMED
ORACLE OCP
JAVA CERTIFIED
MICROSFT CERTIFED
RED HAT LINUX IN INDIA

2. How to A program to add 2 numbers on c compiler
#include<stdio.h>
nt addition(int, int);
nt main()
nt first, second, sum;
rintf("Enter first number:");
canf("%ld", &first);
rintf("Enter second number:");
canf("%ld", &second);
um = addition(first, second);
rintf("The result is : %ldn", sum);
eturn 0;
Design by ilias ahmed

3. int main()
{
FILE *fp;
char file[10];
printf("nEnter the filename: ");
scanf("%s", file);
fp=fopen(file,"r");
yyin=fp;
yylex();
printf("Total identifiers are: %dn", count);

4. Logic: We will write two C programs to find the sum of two integers and
display the addition result as output. ... numbers.
The %d used in scanf() and printf() functions is the format specifier which is
used for int data types in C programming

5. 02# A program to check if comment or not
#include<stdio.h>
#include <conio.h>
int main()
{ char com[30] ;
int i=2 , a=0; printf("n Enter Comment:");
gets(com);
if(com[0]=='/')
{ if(com[1]=='/')
printf("n It is a comment");
else if (com[1]=='*')
{ for (i=2;i<=30;i++) { if(com[i]=='*'&&com[i+1]=='/')
{
printf("n It is a comment");
a=1;
break; }
else
continue;

6. if (a==0) printf("n It is not a comment"); }
else
printf("n It is not a comment"); }
else
printf("n It is not a comment");
getch();
}
INPUT & OUTPUT:
Input: Enter
comment: //hello
Output: It is a
comment Input:
Enter comment:
hello Output: It
is not a comment
Design by ilias ahmed

7. A program to check operator
==================================
===========================
#include<stdio.h>
#include<conio.h>
void main()
{
char s[5];
printf("n Enter any operator:");
gets(s);
switch(s[0])
{
case'>':
if(s[1]=='=')
printf("nGreater than or equal");
else printf("nGreater than");
break;
case'<':

8. if(s[1]=='=')
printf("n Less than or equal");
else printf("nLess than");
break;
case'=':
if(s[1]=='=')
printf("nEqual to");
else
printf("nAssignment");
break;
case'!':
if(s[1]=='=')
printf("nNot Equal");
else
printf("n Bit Not");
break;
case'&':
if(s[1]=='&')
printf("nLogicalAND");

9. case'&':
if(s[1]=='&')
printf("nLogicalAND");
else printf("n BitwiseAND");
break;
case'|':
if(s[1]=='|')
printf("nLogicalOR");
else
printf("nBitwiseOR");
break;
case'+':
printf("nAddition");
break;
case'-':
printf("nSubstraction");
break;

10. case'*':
printf("nMultiplication");
break;
case'/':
printf("nDivision");
break;
case'%':
printf("Modulus");
break;
default:
printf("n Not a operator");
}
getch();
}

11. Design by ilias ahmed