Compilare: user.cpp: In function ‘int main()’: user.cpp:108:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&N); ^ user.cpp:110:45: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] {fscanf(f,"%lf %lf",&A[i].x,&A[i].y);A[i].x=(int)A[i].x;A[i].y=(int)A[i].y;} ^ user.cpp:111:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&M); ^ user.cpp:113:45: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] {fscanf(f,"%lf %lf",&B[i].x,&B[i].y);B[i].x=(int)B[i].x;B[i].y=(int)B[i].y;} ^