Question

I am trying to write a program in C language but keep running into errors. Any help would be awesome. here is my code I have so far.

#include <stdio.h>
#include <conio.h>
#include <string.h>

int main(){
   int lenght, i = 0, state = 0;
   char line[100];

   printf("enter the string for checking of comment line: \n");
   gets(line);

   while(i < strline(line)){
       switch(state){
           case 0: if (line[i] == '/'){
               state = 1; i++;
           }
           else i++;
           break;

           case 1: if (line[i] == '*'){
               state = 2; i++;
           }
           else i++;
           break;

           case 2: if (line[i] == '*'){
               state = 3; i++;
           }
           else i++;
           break;

           case 3: if (line[i] == '*'){
               state = 3; i++;
           }
           else if (line[i] == '/'){
               state =2; i++;
           }
           break;

           case 4: i++;
           break;
       }
   }

//Display output
if (state ==4)
printf("\n The string is recognized as a comment line");
else printf("\n The string is not recongnized as comment line");
getch();
return (0);
}

Answer 1

In the while loop the function you used is the strline but it should be strlen.

Below is the corrected code and output attached:-

#include <stdio.h>
#include <conio.h>
#include <string.h>

int main(){
int lenght, i = 0, state = 0;
char line[100];

printf("enter the string for checking of comment line: \n");
gets(line);

while(i < strlen(line)){
switch(state){
case 0: if (line[i] == '/'){
state = 1; i++;
}
else i++;
break;

case 1: if (line[i] == '*'){
state = 2; i++;
}
else i++;
break;

case 2: if (line[i] == '*'){
state = 3; i++;
}
else i++;
break;

case 3: if (line[i] == '*'){
state = 3; i++;
}
else if (line[i] == '/'){
state =4; i++;
}
break;

case 4: i++;
break;
}
}

//Display output
if (state ==4)
printf("\n The string is recognized as a comment line");
else printf("\n The string is not recongnized as comment line");
getch();
return (0);
}
Output:-