Compilare: user.cpp: In function ‘int main()’: user.cpp:92:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,x,y,z; ^ user.cpp:94:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d",&N,&M); ^ user.cpp:97:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d %d",&x,&y,&z); ^