I sucessfully compiled it under linux and windows it works under linux but under windows it gives an error when I run it.
Code:#include <stdio.h> int main(int argc,char* argv[]){ FILE *fin,*fout; int c; char key[]={(int)argv[3]}; if ((fin=fopen(argv[1],"r"))==NULL){ printf("\nERROR\n"); return 0; } fout=fopen(argv[2],"w"); while((c=fgetc(fin))!=EOF){ c=c^key[0]; fputc(c,fout); } fclose(fin); fclose(fout); return 0; }
You can get it to compile by changing the following bits, but even so, I don't think it's doing what you're intending it to (and it's not safe anyway).
>char key[]={(int)argv[3]};
Change this to:
>char key = argv[3][0];
>c=c^key[0];
Change this to:
>c=c^key;
Do some error checking to ensure the user has provided three valid arguments, before you start indexing the argv array. Thats what I mean by "safe".
I presume the 3rd parameter is a string key used to encrypt the file? At present you are only using the first character. There's a stack of example source for xor encryption, but if you get stuck, post again.
When all else fails, read the instructions.
If you're posting code, use code tags: [code] /* insert code here */ [/code]
