Compilare: user.cpp: In function ‘void floydwarsh()’: user.cpp:15:23: warning: statement has no effect [-Wunused-value] else a[i][j]==0; ~~~~~~~^~~ user.cpp: In function ‘int main()’: user.cpp:21:4: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation] for (i=1;i<=n;i++) ^~~ user.cpp:25:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘for’ for (i=1;i<=n;i++) ^~~