Compilare: main.cpp: In function 'int main()': main.cpp:51:21: warning: this 'else' clause does not guard... [-Wmisleading-indentation] else ^~~~ main.cpp:53:25: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else' b[i+1][j+1]+=x/2; ^