What's New-Given Below
technicalsymposium
technicalsymposium
technicalsymposium

College Lab Codings/Project Codings-Download


DataStructure-Program to convert an expression in postfix form to an infix form.

#include <stdio.h>
#include <conio.h>
#include <string.h>
#define MAX 50
struct postfix
{
char stack[MAX][MAX], target[MAX] ;
char temp1[2], temp2[2] ;
char str1[MAX], str2[MAX], str3[MAX] ;
int i, top ;
} ;
void initpostfix ( struct postfix * ) ;
void setexpr ( struct postfix *, char * ) ;
void push ( struct postfix *, char * ) ;
void pop ( struct postfix *, char * ) ;
void convert ( struct postfix * ) ;
void show ( struct postfix ) ;
void main( )
{
struct postfix q ;
char expr[MAX] ;
clrscr( ) ;
initpostfix ( &q ) ;
printf ( "\nEnter an expression in postfix form: " ) ;
gets ( expr ) ;
setexpr ( &q, expr ) ;
convert ( &q ) ;
printf ( "\nThe infix expression is: " ) ;
show ( q ) ;
getch( ) ;
}
/* initializes data member */
void initpostfix ( struct postfix *p )
{
p -> i = 0 ;
p -> top = -1 ;
strcpy ( p -> target, "" ) ;
}
/* copies given expression to target string */
void setexpr ( struct postfix *p, char *c )
{
strcpy ( p -> target, c ) ;
}
/* adds an expr. to the stack */
void push ( struct postfix *p, char *str )
{
if ( p -> top == MAX - 1 )
printf ( "\nStack is full." ) ;
else
{
p -> top++ ;
strcpy ( p -> stack[p -> top], str ) ;
}
}
/* pops an expr. from the stack */
void pop ( struct postfix *p, char *a )
{
if ( p -> top == -1 )
printf ( "\nStack is empty." ) ;
else
{
strcpy ( a, p -> stack[p -> top] ) ;
p -> top-- ;
}
}
/* converts given expr. to infix form */
void convert ( struct postfix *p )
{
while ( p -> target[p -> i] )
{
/* skip whitespace, if any */
if( p -> target[p -> i] == ' ' )
p -> i++ ;
if ( p -> target[p -> i] == '%' || p -> target[p -> i] == '*' || p -> target[p -> i] == '-' || p -> target[p -> i] == '+' || p -> target[p -> i] == '/' || p -> target[p -> i] == '$' )
{
pop ( p, p -> str2 ) ;
pop ( p, p -> str3 ) ;
p -> temp1[0] = p -> target[p -> i] ;
p -> temp1[1] = '\0' ;
strcpy ( p -> str1, p -> str3 ) ;
strcat ( p -> str1, p -> temp1 ) ;
strcat ( p -> str1, p -> str2 ) ;
push ( p, p -> str1 ) ;
}
else
{
p -> temp1[0] = p -> target[p -> i] ;
p -> temp1[1] = '\0' ;
strcpy ( p -> temp2, p -> temp1 ) ;
push ( p, p -> temp2 ) ;
}
p -> i++ ;
}
}
/* displays the expression */
void show ( struct postfix p )
{
char *t ;
t = p.stack[0] ;
while ( *t )
{
printf ( "%c ", *t ) ;
t++ ;
}
}

technicalsymposium

Technicalsymposium.com-A Complete Website for Engineering Students & Engineering Faculties.All Useful Links & Contents Given Below

technicalsymposium

Free Email Alerts
Get free email alerts-Fresher’s Jobs/Conference/Symposium/Exams Alerts-Click here to Subscribe.

Free Event Publishing
Publish your college technical symposium/free events in our website & Attract more targeted audience- Click here to Get

Conference/Symposium
All engineering colleges /Premier Institutions (IIT,IISC,NIT,etc.,) Conferences/Workshop details-Click here to Get

Fresher’s Jobs/Scholarships Details
Freshers Software Jobs/Government Jobs and Student Internships/Scholarships Details- Click here to Get

Placement Papers
All Software Companies previous placement papers/Govt Competitive exam previous papers/Tech Materials free download-Click her to get.

Lab Programs/Lab Manuals
All Branches of Lab Programs/Lab Manuals for all branches of Engineering-Click here to Get

University Previous Question Papers
Anna university/All leading universities previous question papers year wise and Semester wise- Click here to Get

GATE Question Papers
GATE Previous Question Papers –All Branches by year wise-Click here to Get

Indian Engineering Services (IES) Question Papers
IES Previous Question Papers –All Branches by year wise-Click here to Get

Anna University Syllabus
Anna University all branches syllabues free download for all B.E(All Branches)/B.Tech(All Branches)/M.E/M.Tech/MCA/MBA- Click here to Get

GATE/ All Entrance Exam Syllabus
GATE/ All Leading Entrance Exam Syllabus free download-Click here to Get

Competitive Exam Syllabuses
Bank/Railway/SSC,all kind of Competitive Exam syllabuses free Download-Click here to get

Civil Engineering Lecture Notes
Civil engineering lecture notes by semester wise and Lab Programs/Manuals-Click here to get

Electronics & Communication Engineering (ECE) Lecture Notes
Electronics & Communication Engineering (ECE) by semester wise and Lab Programs/Manuals-Click here to get

Electronics & Electronics Engineering (EEE) Lecture Notes
Electronics & Electronics Engineering (EEE) lecture notes by semester wise and Lab Programs/Manuals-Click here to get

Mechanical Engineering (MECH) Lecture Notes
Mechanical Engineering (MECH) lecture notes by semester wise and Lab Programs/Manuals-Click here to get

Computer Science Engineering (CSE) Lecture Notes
Computer Science Engineering (CSE) lecture notes by semester wise and Lab Programs/Manuals-Click here to get

Information Technology Lecture Notes
Information Technology lecture notes by semester wise and Lab Programs/Manuals-Click here to get

MCA Lecture Notes
MCA lecture notes by semester wise and Lab Programs/Manuals-Click here to get

Automobile Engineering Lecture Notes
Automobile Engineering lecture notes by semester wise and Lab Programs/Manuals-Click here to get

Aeronautical Engineering Lecture Notes
Aeronautical Engineering lecture notes by semester wise and Lab Programs/Manuals-Click here to get

Bio-Medical Engineering Lecture Notes
Bio-Medical Engineering lecture notes by semester wise and Lab Programs/Manuals-Click here to get

Bio-Technology Lecture Notes
Bio-Technology lecture notes by semester wise and Lab Programs/Manuals-Click here to get

MBA Lecture Notes
MBA lecture notes by semester wise and Lab Programs/Manuals-Click here to get

Hosting by Yahoo!

About-Us    Contact-Us    Site-map

©copyright 2009 All rights are reserved to technicalsymposium.com