Compilare: user.cpp:1:18: warning: extra tokens at end of #include directive [enabled by default] #include <cstdio> ^ user.cpp: In function ‘int main()’: user.cpp:105:22: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(f,1,MAX,IN); ^ user.cpp: In function ‘void R_Ch(char&)’: user.cpp:24:36: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(f,MAX,1,IN),pos=0; ^