Compilare: user.cpp: In function ‘int main()’: user.cpp:25:30: warning: format ‘%d’ expects argument of type ‘int*’, but argument 2 has type ‘int64_t* {aka long long int*}’ [-Wformat=] scanf("%d %d %d", &a, &b, &c); ^ user.cpp:25:30: warning: format ‘%d’ expects argument of type ‘int*’, but argument 3 has type ‘int64_t* {aka long long int*}’ [-Wformat=] user.cpp:25:30: warning: format ‘%d’ expects argument of type ‘int*’, but argument 4 has type ‘int64_t* {aka long long int*}’ [-Wformat=] user.cpp:27:36: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘int64_t {aka long long int}’ [-Wformat=] printf("%d", fastpow(a % c, b) % c); ^ user.cpp:22:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("modulo.in", "r", stdin); ^ user.cpp:23:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("modulo.out", "w", stdout); ^ user.cpp:25:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &a, &b, &c); ^