Compilare: user.cpp: In function ‘void cpy(unsigned int*, const unsigned int*)’: user.cpp:15:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i <= B[0]; i++) ^ user.cpp: In function ‘void add(unsigned int*, const unsigned int*)’: user.cpp:22:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=1; i<=A[0] || i<=B[0] || t; i++, t/=Base) ^ user.cpp:22:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=1; i<=A[0] || i<=B[0] || t; i++, t/=Base) ^ user.cpp: In function ‘void mul(unsigned int*, unsigned int)’: user.cpp:34:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 1; i <= A[0] || t; i++, t /= Base) ^ user.cpp: In function ‘void mult(unsigned int*, const unsigned int*)’: user.cpp:49:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 1; i <= A[0]; i++) ^ user.cpp:51:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (t=0, j=1; j <= B[0] || t; j++, t/=Base) ^ user.cpp: In function ‘int main()’: user.cpp:97:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("grazing.in", "r", stdin); ^ user.cpp:98:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("grazing.out", "w", stdout); ^ user.cpp:101:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N); ^