Compilare: user.cpp: In function ‘int det(int)’: user.cpp:21:16: warning: unused variable ‘i’ [-Wunused-variable] int copie, i, y; ^ user.cpp: In function ‘int main()’: user.cpp:55:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.cpp:56:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^ user.cpp:57:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &m); ^ user.cpp:60:56: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d%d", &v[i].x, &v[i].y, &v[i].c); ^