Compilare: user.cpp: In function ‘int main()’: user.cpp:29:42: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] mat[x][y][z] = x ^ y ^ z + 1 * 23;//mat[x][y][z] = inside(3, x, y, z); ^ user.cpp:20:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("menger.in", "r", stdin); ^ user.cpp:21:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("menger.out", "w", stdout); ^ user.cpp:24:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ user.cpp:35:72: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d %d %d %d", &g, &x1, &y1, &z1, &x2, &y2, &z2); ^