Check Number of lines

Check the number of lines in file to confront with the maximum defined of macro definition.

The following approach can be investigated further
```
int countLines(int *lineNum, char *filename)
{
char cmd[512];
sprintf(cmd,"wc -l < %s", filename);

FILE *pipe = popen(cmd,"r");
if(pipe == NULL) {
perror("popen failed");
return 1;
}

if(!(fscanf(pipe,"%d",lineNum))){
perror("fscanf failed");
pclose(pipe);
return 1;
}

pclose(pipe);
return 0;
}
```