Compilare: main.cpp: In function 'int main()': main.cpp:60:44: warning: 'j1' may be used uninitialized in this function [-Wmaybe-uninitialized] fout << i1 << ' ' << j1 << ' ' << i1 << ' ' << j2 << '\n'; ^~~ main.cpp:66:38: warning: 'i1' may be used uninitialized in this function [-Wmaybe-uninitialized] fout << mt[i1][j2] - (gc2 - suma_magica); ~~~~~~~~~^ main.cpp:66:38: warning: 'j2' may be used uninitialized in this function [-Wmaybe-uninitialized] main.cpp:90:38: warning: 'i2' may be used uninitialized in this function [-Wmaybe-uninitialized] fout << mt[i2][j2] - (gl2 - suma_magica) << ' '; ~~~~~~~~~^ main.cpp:103:55: warning: 'suma_magica' may be used uninitialized in this function [-Wmaybe-uninitialized] fout << mt[i2][j1] + (suma_magica - gl2) << ' '; ~~~~~~~~~~~~~^~~~~~