Compilare: main.cpp: In function 'int main()': main.cpp:14:1: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for (int i = 2; i <= n; ++i) ^~~ main.cpp:17:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' int i ; ^~~ main.cpp:11:23: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d", &n); ^