Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:15:9: error: no match for ‘operator=’ (operand types are ‘FILE {aka _IO_FILE}’ and ‘FILE* {aka _IO_FILE*}’) output = fopen("adunare.out", "w"); ^ user.cpp:15:9: note: candidates are: In file included from /usr/include/stdio.h:75:0, from /usr/include/c++/4.8/cstdio:42, from /usr/include/c++/4.8/ext/string_conversions.h:43, from /usr/include/c++/4.8/bits/basic_string.h:2815, from /usr/include/c++/4.8/string:52, from /usr/include/c++/4.8/bits/locale_classes.h:40, from /usr/include/c++/4.8/bits/ios_base.h:41, from /usr/include/c++/4.8/ios:42, from /usr/include/c++/4.8/ostream:38, from /usr/include/c++/4.8/iostream:39, from user.cpp:1: /usr/include/libio.h:273:8: note: _IO_FILE& _IO_FILE::operator=(const _IO_FILE&) struct _IO_FILE { ^ /usr/include/libio.h:273:8: note: no known conversion for argument 1 from ‘FILE* {aka _IO_FILE*}’ to ‘const _IO_FILE&’ /usr/include/libio.h:273:8: note: _IO_FILE& _IO_FILE::operator=(_IO_FILE&&) /usr/include/libio.h:273:8: note: no known conversion for argument 1 from ‘FILE* {aka _IO_FILE*}’ to ‘_IO_FILE&&’ user.cpp:16:31: error: cannot convert ‘FILE {aka _IO_FILE}’ to ‘FILE* {aka _IO_FILE*}’ for argument ‘1’ to ‘int fprintf(FILE*, const char*, ...)’ fprintf(output, "%d\n", a + b); ^ user.cpp:19:15: error: cannot convert ‘FILE {aka _IO_FILE}’ to ‘FILE* {aka _IO_FILE*}’ for argument ‘1’ to ‘int fclose(FILE*)’ fclose(output); ^