Compilare: main.cpp: In function 'void roy_floyd()': main.cpp:15:9: warning: unused variable 'i' [-Wunused-variable] int i, j ,k; ^ main.cpp:15:12: warning: unused variable 'j' [-Wunused-variable] int i, j ,k; ^ main.cpp:15:15: warning: unused variable 'k' [-Wunused-variable] int i, j ,k; ^ main.cpp: In function 'int main()': main.cpp:32:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int i = 1; i <= n ; i++) ^~~ main.cpp:36:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' roy_floyd(); ^~~~~~~~~