Compilare: user.cpp: In function ‘int main()’: user.cpp:13:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d %d %d",&t,&m,&n,&k); ^ user.cpp:19:50: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d %d %d",&a,&b,&c,&d); ^ user.cpp:48:50: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d %d %d",&a,&b,&c,&d); ^