Compilare: user.cpp: In function ‘int main()’: user.cpp:114:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&n); ^ user.cpp:117:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&v[i][j]); ^ user.cpp:119:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&k); ^ user.cpp:120:56: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(int i = 0 ; i < k ; ++i) fscanf(in,"%d",&sol[i]); ^ user.cpp: In function ‘void drum()’: user.cpp:81:19: warning: ‘p2’ may be used uninitialized in this function [-Wmaybe-uninitialized] while (lin != 0 || col != 0){ ^ user.cpp:81:19: warning: ‘p1’ may be used uninitialized in this function [-Wmaybe-uninitialized]