Compilare: main.cpp: In function 'int main()': main.cpp:18:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(i=0;s[i];) ^~~ main.cpp:35:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' sort(a.begin(),a.end()); ^~~~