Thread: next line problem

I am just working on substitution cipher program. reading from one file and substuted characters by other characters and write in new file.
I dont want to substitute space ' ' and next line.
How can make sure that when function read next line from first file it automatically goes to next line in 2nd file?
Here the code :

Code:

while((ch=fgetc(fpsource))!=EOF)
	{
		if(ch!=' ')
		{
			for(i=0;i<strlen(str1);i++)
			{
				if(ch==str1[i])
				{	fputc(str2[i],fptarget);
					break;
				}
			}
		}
		else
			fputc(ch,fptarget);
	}