Compilare: user.cpp: In function ‘int main()’: user.cpp:57:42: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long long int’ [-Wformat=] fprintf( fout, "%d\n", sum - sol ); ^ user.cpp: In function ‘void r(int&)’: user.cpp:22:57: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread( buff, 1, sizeof(buff), fin ), poz = 0; ^ user.cpp:28:57: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread( buff, 1, sizeof(buff), fin ), poz = 0; ^ user.cpp: In function ‘int main()’: user.cpp:34:40: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread( buff, 1, sizeof(buff), fin ); ^