Compilare: user.c: In function ‘main’: user.c:15:37: warning: unused variable ‘u’ [-Wunused-variable] int m,n,i,j,max = -999999,c1,c2,u,r = 0,a,sc,nrc; ^ user.c:16:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d",&m,&n); ^ user.c:21:19: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&a); ^ user.c:36:24: warning: ‘nrc’ may be used uninitialized in this function [-Wmaybe-uninitialized] nrc++; ^