c programming

ibabhelix · 10-27-2009, 04:09 AM

I ve written a code and there is one small query, how do i stop writing into this text file when i see TER and then continue with rest of the function my code is :

Code:

void ProcessFile(char fileName[])
{
	int i;
	FILE *rfile;
	FILE *wfile;
	char writeFileName[30], readLine[80];

	if ((rfile = fopen (fileName,"r")) == NULL)
	{
		perror(fileName);
		printf("Exiting program!");
		//getch();
		exit(1);
	}
	else
	{
		CutAndPasteString(writeFileName, ".pdb", ".rtf", fileName);
		wfile = fopen (writeFileName, "w");
	
		while(!feof(rfile))
		{
			fgets(readLine, sizeof(readLine), rfile);

			if(readLine[0] == 'A' && readLine[1] == 'T' && readLine[2] == 'O' && readLine[3] == 'M')
			{
				if (CheckForValues(readLine))
				{
					//printf("%c\n", readLine[13]);
					fputs(readLine, wfile);

					if (strlen(readLine) < 80)
					{
						for (i=0;i<(80 - strlen(readLine));i++)
							fputc(' ', wfile);
					}
					fputs("\n", wfile);
				}
			}
else if (readLine [0] == 'T' && readLine[1] == 'E' && readLine[2] =='R' )
					
		}
		fclose(wfile);fclose(rfile);
		
		ReadingFiles0(0, writeFileName, "cp4.txt");
		ReadingFiles1(0, writeFileName, "cpc4.txt");
		ReadingFiles2(0, writeFileName, "cpcp4.txt");
	}
	return;
}

i want to stop writing into the output file after the condition which i ve highlighted in red, n then proceed with function reading file. how do i do that ?
If i give exit (0);
it exits the whole function how do i sort this ?

please help me.

vijay_babu1981 · 10-27-2009, 04:14 AM

break; will break the while loop.
return; can return from anywhere within the function.

Wim Sturkenboom · 10-27-2009, 04:17 AM

Use break to break from your while-loop

Code:

while (...)
{
    if (readLine [0] == 'T' && readLine[1] == 'E' && readLine[2] =='R')
    {
        break;
    }
}

It will then continue with your existing fclose statements.

I also suggest to have a look at the strstr and strcmp functions (depending on the string that contains TER

PS
There is a dedicated programming section at LQ

smeezekitty · 10-27-2009, 01:12 PM

Quote:

Originally Posted by Wim Sturkenboom

I also suggest to have a look at the strstr and strcmp functions (depending on the string that contains TER

although that would be slower for a small string.
because it has to
*enter the function
*start the internal loop maybe even run too many loops then necessary
*end the internal loop
*return back
where the if(x[0]==?) is just a comparison in memory

Tinkster · 10-27-2009, 10:31 PM

Moved: This thread is more suitable in <PROGRAMMING> and has been moved accordingly to help your thread/question get the exposure it deserves.