Compilare: user.cpp: In function ‘int main()’: user.cpp:72:15: warning: unused variable ‘a’ [-Wunused-variable] int T, i, j, a, b, c; ^ user.cpp:72:18: warning: unused variable ‘b’ [-Wunused-variable] int T, i, j, a, b, c; ^ user.cpp:72:21: warning: unused variable ‘c’ [-Wunused-variable] int T, i, j, a, b, c; ^ user.cpp:80:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d", &N, &T); ^ user.cpp:88:62: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d%d", &boxes[i].x, &boxes[i].y, &boxes[i].z); ^