does this actually work? it looks like your file pointers are being assigned to
NULL in the if statements.
On Dec 6, 2009, at 3:40 PM, samar aseeri wrote:
> hi,
>
> the below attached program uses the argument command line the copy a file to
> another file. my question is what can I change in the program to make only
> part of the first file be copied to the second.
>
> #include<stdio.h>
> int main(int argc, char *argv[])
> {
> FILE *inFilePtr; /*input file pointer*/
> FILE *outFilePtr; /*output fole pointer*/
> int c,i;
> /*check number of command-line arguments */
> if(argc != 3){
> printf("Usage: mycopy infile outfile\n");} /*end if*/
> else /*if input file can be opened*/
> {
> if((inFilePtr=fopen(argv[1],"r"))!=NULL) /*if input file can be
> opened*/
> { if((outFilePtr =fopen(argv[2], "w")) != NULL) /*if output file can
> be opened*/
> {while((c = fgetc(inFilePtr)) !=EOF) /*read and output
> characters*/
> {
> fputc(c,outFilePtr);}/*end while*/
> }/*end if*/
> else /*output file could not be opened*/
> {printf("File\"%s\" could not be opened\n", argv[2]);
> } /*end else*/
> }/*end if*/
> else /*input file could not be opened*/
> { printf("File\"%s\" coulk not be opened\n", argv[1]);} /*end else*/
> } /*end else*/
> return 0; /*indicates successful termination*/
> }/*end main*/
>
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> [Non-text portions of this message have been removed]
>
>
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