sotron.cpp:2: error: expected nested-name-specifier before 'namespacestd' sotron.cpp:2: error: 'namespacestd' has not been declared sotron.cpp:4: error: expected ';' before 'char' sotron.cpp: In function 'void citire()': sotron.cpp:23: error: 'ifstream' was not declared in this scope sotron.cpp:23: error: expected ';' before 'fin' sotron.cpp:25: error: 'fin' was not declared in this scope sotron.cpp: In function 'void rezolvare()': sotron.cpp:34: warning: unused variable 'k' sotron.cpp: In function 'void afisare()': sotron.cpp:84: error: 'ofstream' was not declared in this scope sotron.cpp:84: error: expected ';' before 'fout' sotron.cpp:85: error: 'fout' was not declared in this scope