Compilare: user.cpp: In function ‘int main()’: user.cpp:16:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d\n",&n,&m); ^ user.cpp:53:16: warning: ‘ij’ may be used uninitialized in this function [-Wmaybe-uninitialized] c[ij][jj]=1; ^ user.cpp:53:16: warning: ‘jj’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:38:16: warning: ‘ir’ may be used uninitialized in this function [-Wmaybe-uninitialized] b[ir][jr]=1; ^ user.cpp:38:16: warning: ‘jr’ may be used uninitialized in this function [-Wmaybe-uninitialized]