Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:10:35: error: cannot convert ‘FILE* {aka _IO_FILE*}’ to ‘const char*’ for argument ‘1’ to ‘FILE* fopen(const char*, const char*)’ FILE *f = fopen(f, "cmmdc.in", "r"); ^ user.cpp:11:36: error: cannot convert ‘FILE* {aka _IO_FILE*}’ to ‘const char*’ for argument ‘1’ to ‘FILE* fopen(const char*, const char*)’ FILE *g = fopen(g, "cmmdc.out", "w"); ^ user.cpp:13:11: error: conflicting declaration ‘std::ifstream f’ ifstream f("cmmdc.in"); ^ user.cpp:10:7: error: ‘f’ has a previous declaration as ‘FILE* f’ FILE *f = fopen(f, "cmmdc.in", "r"); ^ user.cpp:14:11: error: conflicting declaration ‘std::ofstream g’ ofstream g("cmmdc.out"); ^ user.cpp:11:7: error: ‘g’ has a previous declaration as ‘FILE* g’ FILE *g = fopen(g, "cmmdc.out", "w"); ^ user.cpp:24:13: warning: null argument where non-null required (argument 2) [-Wnonnull] fprintf(g, 0); ^ user.cpp:29:8: error: ‘close’ was not declared in this scope close(f); ^ user.cpp:8:16: warning: unused variable ‘d’ [-Wunused-variable] unsigned a, b, d, r; ^