Using file concept with Command line arguments.declare a variable (lcnt) used to count the no of lines.Open a file in read made and then using while loop check the condition for not equal to EOF.Later using if condition check check for new line and increment the variable for counting the lines.

Then using while,check for the character '/','*' (as the comments start with these characters) and end with ('*' and '/').if condition of this is true then break and come out of the block else increment the line.

Here is the code for both single comment and multiple comments(Here multiple newline characters are not taken care of)
#include<stdio.h>
int main()
{
FILE *fp;
int nol=0;//To count the number of lines
int comment=0;//As a flag to indicate comment is started
char ch;
fp=fopen("file.txt","r");//here file.txt is a file which i created with some lines,comments both // and /* ...*/
if(fp==NULL)
{
printf("
Cannot open the file ");
getch();
return;
}

while(!feof(fp))
{
ch=getc(fp);
if(ch == '
' && comment == 0)
nol++; //increment only when a newline charecter occurs outside the comment

if(ch == '/'){
ch = getc(fp);
if(ch=='*')//check for starting comment /* (multiple lines comment)
comment=1;
else
if(ch=='/')//check for starting comment // (single line comment)
while((ch = getc(fp)) != '
')
;
}
if(ch == '*'){
ch = getc(fp);
if(ch=='/' )
comment=0;
if((ch =getc(fp) =='
'))
;
}

}

fclose(fp);

printf("
Number of lines = %d",nol);
getch();
}

If you have the better answer, then send it to us. We will display your answer after the approval.

Name :*
Email Id :*
Answer :*
Verification Code	Not readable? Load New Code
Enter the above shown code:*
	Inform me about updated answers to this question