Compilare: user.c: In function ‘main’: user.c:10:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%u %u", &m, &n); ^ user.c:13:13: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%u",&a[i][j]); ^ user.c:8:34: warning: ‘j’ may be used uninitialized in this function [-Wmaybe-uninitialized] unsigned a[M][M], b[M][M],m,n,i,j,min1,min2,jmin; ^