Compilare: main.cpp: In function 'int main()': main.cpp:49:21: warning: variable 'o' set but not used [-Wunused-but-set-variable] int o=0; ^ main.cpp:77:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation] if (OK==0) ^~ main.cpp:79:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if' fin.close(); ^~~ main.cpp:76:19: warning: 'i1' may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<i1<<" "<<i2; ^~~ main.cpp:42:13: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized] if (v[i][0]!=y) ^~