Compilare: main.cpp: In function 'int main()': main.cpp:23:49: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if(a[i][k]+a[k][j]<a[i][j] || a[i][j] == 0 && i != j) a[i][j]=a[i][k]+a[k][j]; ~~~~~~~~~~~~~^~~~~~~~~ main.cpp:26:6: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(j=1;j<=n;j++) ^~~ main.cpp:28:7: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' cout<<'\n'; ^~~~