"C" PROGRAM TO FIND WHETHER THE STRING IS KEYWORD, CONSTANT or NOT

PROGRAM TO FIND WHETHER STRING IS A KEYWORD OR NOT

#include<stdio.h>

#include<conio.h>

#include<string.h>

void main()

{

int i,flag=0,m;

char s[5][10]={"if","else","goto","continue","return"},st[10];

clrscr();

printf("\n enter the string :");

gets(st);

for(i=0;i<5;i++)

{

m=strcmp(st,s[i]);

if(m==0)

flag=1;

}

if(flag==0)

printf("\n it is not a keyword");

else

printf("\n it is a keyword");

getch();

}

OUTPUT

enter the string :return it is a keyword

enter the string :hello it is  not a keyword

PROGRAM TO FIND WHETHER THE STRING IS CONSTANT OR NOT

#include<stdio.h>

#include<conio.h>

#include<ctype.h>

#include<string.h>

void main()

{

char str[10]; int len,a; clrscr();

printf("\n Input a string :");

gets(str); len=strlen(str); a=0; while(a<len)

{

if(isdigit(str[a]))

{

} 

else 

{

} 

}

a++;

printf(" It is not a Constant");

break;

if(a==len)

{

printf(" It is a Constant");

}

getch();

}

OUTPUT

Input a string :23

It is a Constant

Input a string :a_123

It is not a Constant

 

Posted in: C / C++ Program