hi friends, I've coded a file merging program in C. though, the program seems to work far upto as how it supposed to but there is a problem. when i tried to merge few media files to make it a whole in one then i got its size desirable equal to the sum of all ones though but I didn't get it played anyway. Code: #include<stdio.h> #include<string.h> char buffer[BUFSIZ]; main() { FILE *fsource,*fdest; char dirpath[30],sourcepath[40],destpath[40]; int files=0,count; clrscr(); // input directory printf("enter the full path of directory the content of which is to reconcile\n"); gets(dirpath); printf("\nenter the number of files stored in this directory"); scanf("\n%d",&files); strcpy(destpath,dirpath); strncat(destpath,"movie.flv",9); fdest=fopen(destpath,"wb"); setvbuf(fdest,buffer,_IOFBF,BUFSIZ); fseek(fdest,0L,1); for(count=1;count<=files;count++) { sprintf(sourcepath,"%s%d%s",dirpath,count,".flv"); fsource=fopen(sourcepath,"rb"); fseek(fsource,0L,1); setvbuf(fsource,buffer,_IOFBF,BUFSIZ); printf("\npart %d is being processed",count); while(fread(buffer,BUFSIZ,1,fsource)) { fseek(fsource,BUFSIZ,1); fwrite(buffer,BUFSIZ,1,fdest) ; fseek(fdest,BUFSIZ,1); } printf("\npart %d is processed",count); } } please someone nail out the problem