Compilare: user.cpp: In function ‘int main()’: user.cpp:34:40: warning: format ‘%i’ expects argument of type ‘int’, but argument 2 has type ‘long long int’ [-Wformat=] printf("%i\n",power(a,euler(n)-1,n)); ^ user.cpp:31:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("inversmodular.in","r",stdin); ^ user.cpp:32:44: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("inversmodular.out","w",stdout); ^ user.cpp:33:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a,&n); ^