Compilare: main.cpp: In function 'int main()': main.cpp:11:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(j = 1; j <= n; ++j) ^~~ main.cpp:13:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' if(i == j) ^~ main.cpp:15:23: warning: 'j' may be used uninitialized in this function [-Wmaybe-uninitialized] else if (i+j == n) ~^~