Write a c program that can check a given line is comment or not

///C program that can check a given line is comment or not
/*
Alamgir Hossain
Computer Science & Engineering
Jessore University of Science & Technology
*/
#include<stdio.h>
int main()
{
    char ch[1000];
    int ck = 0,i,ln;
    printf("Enter the line : ");
    gets(ch);
    ln = strlen(ch);
    if(ch[0]=='/'){
        if(ch[1]=='/'){
            printf("Its a comment line\n");
        }
        else if(ch[1]=='*'){
            for(i=2;i<ln;i++){
                if(ch[i]=='*'&&ch[i+1]=='/'){
                    printf("Its a comment line\n");
                    break;
                }
                else{
                    ck = 1;
                }
            }
        }

    }
    else if(ck==1){
        printf("Its not a comment.\n");
    }
    else{
        printf("Not a Comment line\n\n");
    }

    return 0;
}