Eroare de compilare: main.cpp: In function 'int main()': main.cpp:66:2: error: 'ifstream' was not declared in this scope ifstream f("input.in"); ^~~~~~~~ main.cpp:66:2: note: suggested alternative: In file included from /usr/include/c++/6/ios:38:0, from /usr/include/c++/6/ostream:38, from /usr/include/c++/6/iostream:39, from main.cpp:2: /usr/include/c++/6/iosfwd:162:34: note: 'std::ifstream' typedef basic_ifstream<char> ifstream; ^~~~~~~~ main.cpp:67:2: error: 'ofstream' was not declared in this scope ofstream g("output.out"); ^~~~~~~~ main.cpp:67:2: note: suggested alternative: In file included from /usr/include/c++/6/ios:38:0, from /usr/include/c++/6/ostream:38, from /usr/include/c++/6/iostream:39, from main.cpp:2: /usr/include/c++/6/iosfwd:165:34: note: 'std::ofstream' typedef basic_ofstream<char> ofstream; ^~~~~~~~ main.cpp:70:2: error: 'f' was not declared in this scope f >> n >> m; ^ main.cpp:77:2: error: 'g' was not declared in this scope g << sum_max; ^ main.cpp:69:28: warning: unused variable 'i' [-Wunused-variable] int n, m, matrice[20][20],i,j,k,l,ok=1; ^ main.cpp:69:30: warning: unused variable 'j' [-Wunused-variable] int n, m, matrice[20][20],i,j,k,l,ok=1; ^ main.cpp:69:32: warning: unused variable 'k' [-Wunused-variable] int n, m, matrice[20][20],i,j,k,l,ok=1; ^ main.cpp:69:34: warning: unused variable 'l' [-Wunused-variable] int n, m, matrice[20][20],i,j,k,l,ok=1; ^ main.cpp:69:36: warning: unused variable 'ok' [-Wunused-variable] int n, m, matrice[20][20],i,j,k,l,ok=1; ^~ Non zero exit status: 1