Compilare: user.c: In function ‘main’: user.c:40:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n, &m); ^ user.c:69:29: warning: ‘tmin’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (r[i][j]==r2[i][j] && r[i][j]<tmin && r2[i][j]!=-1){ ^ user.c:66:6: warning: ‘y2’ may be used uninitialized in this function [-Wmaybe-uninitialized] lee(x2, y2, r2); ^ user.c:66:6: warning: ‘x2’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.c:65:6: warning: ‘y1’ may be used uninitialized in this function [-Wmaybe-uninitialized] lee(x1, y1, r); ^ user.c:65:6: warning: ‘x1’ may be used uninitialized in this function [-Wmaybe-uninitialized]