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#include <stdio.h>#include <stdlib.h>main(int argc, char *argv[]){    FILE *ein, *aus;    int ch;    if(argc !=3)        exit(1);    if((ein=fopen(argv[1], "rb"))==NULL)        exit(2);    if((aus=fopen(argv[2], "wb"))==NULL)        exit(3);    ch=fgetc(ein);    while(!feof(ein)) {        fputc(ch, aus);        ch=fgetc(ein);    }    fclose(ein);    fclose(aus);}