Compilare: user.c: In function ‘main’: user.c:35:8: warning: unused variable ‘j’ [-Wunused-variable] int i, j=0; ^ user.c:35:5: warning: unused variable ‘i’ [-Wunused-variable] int i, j=0; ^ user.c:34:15: warning: unused variable ‘array2’ [-Wunused-variable] int *array1, *array2; ^ user.c:34:6: warning: unused variable ‘array1’ [-Wunused-variable] int *array1, *array2; ^ user.c:33:14: warning: unused variable ‘length2’ [-Wunused-variable] int length1, length2, found; ^ user.c:40:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%d", &length1); ^