Question

Create program which verifies if input string is a valid variable declaration or not. Use C programming language.

- This program can only use the following variable types: char, float, and int

- Remove any newline \n from input string

- The input prompt should say ">>> "

- If input declaration is valid, it should print "Valid dec\n"

- If input declaration is invalid, it should print "Invalid dec\n"

- Make sure the identifier entered matches the rules of C identifiers

- No need to worry about value assignments (Ex. int i = 0;)

Example Runs:

• Invalid identifier.

    >>> char 3var;
    Invalid dec

• Invalid type.

    >>> double my_var;
    Invalid dec

• Valid declaration.

    >>> int my_int;
    Valid dec

Answer 1

Code:

#include<stdio.h>
#include<conio.h>
#include<string.h>
void main()
{
char string[25];
int count=0,flag;
printf("enter any string: ");
scanf("%s",string);
printf(">>>",string);
if((string[0]>='a'&&string[0]<='z')||(string[0]>='A'&&string[0]<='Z')||(string[0]=='_'))
{
for(int i=1;i<=strlen(string);i++)

{
if((string[i]>='a'&& string[i]<='z')||(string[i]>='A' && string[i]<='Z')||(string[i]>='0'&& string[i]<='9')

||(string[i]=='-')){
count++;
}}

if(count==strlen(string))
{
flag=0;
}
  
}
else
{
flag=1;
}
if(flag==1)

printf("Invalid dec\n");
else
printf("Valid dec\n");
}

Note:***I hope your happy with my answer***If you have any doubts please comment me****Thank you....