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int main(int argc, char* argv[]){
    char ch;
    FILE* in;
    FILE* out;
    
    in = fopen("in.txt", "rb");  /* in.txtȫΪӢÎÄ×Ö·û */
    out = fopen("out.txt", "wb");
    while ((ch = getc(in)) != EOF){
         putc(ch, out);
    }
}
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1, Linux Operating System
System Environment: Ubuntu GNU / Linux, RedHat Linux AS5,
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