Compilare: user.cpp: In function ‘int main()’: user.cpp:22:21: warning: unused variable ‘d1’ [-Wunused-variable] int n,i,a, b,d, c,d1, x1, y1,cmmdc; ^ user.cpp:22:32: warning: variable ‘cmmdc’ set but not used [-Wunused-but-set-variable] int n,i,a, b,d, c,d1, x1, y1,cmmdc; ^ user.cpp:27:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d", &n); ^ user.cpp:30:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d %d", &a, &b,&c); ^