Compilare: user.c: In function ‘main’: user.c:9:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d %d",&m,&n,&k); ^ user.c:10:43: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] for(i=1;i<=m;i++) for(j=1;j<=n;j++) fscanf(fi,"%d",&a[i][j]); fclose(fi); ^