Compilare: main.cpp: In function 'int main()': main.cpp:11:4: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(i = 1;i <= n/2;i++) ^~~ main.cpp:13:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' int j = 0; ^~~ main.cpp:9:9: warning: unused variable 'st' [-Wunused-variable] int st,dr,n,i; ^~ main.cpp:9:12: warning: unused variable 'dr' [-Wunused-variable] int st,dr,n,i; ^~