José Valente de Oliveira e Fernando Lobo
Introdução à
José Valente de Oliveira e Fernando Lobo
The Ualg Informatics Lab
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Escrever Tabela vazia
Senão
Dividir soma por número;
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Repetir os passos seguintes até chegar ao último aluno
Ler a nota do próximo aluno da tabela
Adicionar 1 a número;
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0 0 0
1 1 1 |
2 2 10 ||
3 10 11 |||
4 11 100 ||||
5 12 101 |||||
6 20 110 ||||||
7 21 111 |||||||
8 22 1000 ||||||||
9 100 1001 |||||||||
10 101 1010 ||||||||||
11 102 1011 |||||||||||
12 110 1100 ||||||||||||
13 111 1101 |||||||||||||
14 112 1110 ||||||||||||||
15 120 1111 |||||||||||||||
16 121 10000 ||||||||||||||||
17 122 10001 |||||||||||||||||
18 200 10010 ||||||||||||||||||
19 201 10011 |||||||||||||||||||
20 202 10100 ||||||||||||||||||||
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PrimeiroPrograma
50 D.330 9038.63J0, 8.9 03-9009 + 6.33+ / 063+;0/ > 8+,+9+public
0380-2D2-+ + 7+ -,+330> 9.33. / .7.< 2672-+ 50/ 8.709J 53+9 + -,+330> 0340 / ./ 064.< 264090330 90409 50 + 0189033F.public static void main(String[] args)
270642D2-+ . 89.;9+/ + 8926-28+,> +52 50 + 010-5EF. 7. 89.;9+/ + -./ 0E+< 5+67. . / +67+/ .3 010-54+9> .9 .549+3 8+,+9+3< + / J526+ 2945+, ++ 89.-59+ 8.9
main
6+ -,+330 -./ . / 03/ . 6./ 0 7. D2-T029. .670 03-90 0/ .3 . 89.;9+/ +> 08.23 7234.< + 010-5EF. -.64265+ + 8+9429 7+ 892/ 029+ 263495EF. 70main
> 3 -T+ 04+3{
0}
< +3326+,+/ . 26A-2. 0 . D2/ 70 5/ 70 263495E03> 0340 89.;9+/ + 3090/ 8+9+ 2672-+9 .670 -./ 0E+ 0 +-+B+ + -,+330< +332/ -./ . .670 -./ 0E+ 0 +-+B+ . 89.;9+/ + 8926-28+,> 34J B0/ 70 09 50 C + 263495EF.System.out.print("Primeiro programa em Java.");
50 03-900 +
"Primeiro programa em Java."
6. 0-9F>
. 6.33. 30;567. 89.;9+/ + 0/ ++ +/ .3 70-,+9+9< 262-2+9 0 03-90 09 6. 0-9F 5/ + +92J 0, 7. 428. 264029.>
public class SegundoPrograma {
public static void main(String [] args) {
int i=2;
System.out.print("Programa No " + i + " em Java.");
}
-&#L#/'- + /'- -03- 2&+?&%( % -0$&-)- "+ -$&P
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int
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'0%( %2-"%0 '( H#3I 5-$*%&%P+ 5- )%)-#0 5- /'%*/'-& '( 5-03-0 3#2+0 D L-#3% 0-( 2&- $+( + #"5#$%5+ "+ 2&+?&%( % %$#( %
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% '( % )%)-*6 #00+ 0-&#% %00#"%*%5+ $+( + '( -&&+
+9+ -./ 89006709/ .3 -./ 8,04+/ 0640 . 50 32;62D2-+ 5/ + +92J 0, 0/ 89.;9+/ +EF. 0 09/ .3 / +23 +,;563 +380-4.3 0,0/ 064+903 7. + + +/ .3 03-9009 5/ 89.;9+/ + 50 3./ 0 7.23 264029.3>
public class Soma2int {
public static void main(String[] args) {
int a, b, s;
a=7; b=18;
s=a+b;
System.out.print(a + " + " + b + " = " + s );
}
}
. 309 010-54+7.< . 89.;9+/ + +2 89.7529 . 30;52640 9035,4+7.7 + 8 = 25
> 092D250 89.;9+/ + 8926-28+, -./ 0E+ 8.9 70-,+9+9 49 3 +92J 023 7. 428. 264029.int a, b, s;
5/ +,.9> . 309 70-,+9+7+< -+7+ +92J0, 90309+ 8+9+ 32 038+E. 6+ / 0/ 92+ 7. -./ 854+7.9< .670 29J ;5+97+9 .3 3053 +,.903> +7+ +92J0, 40/ 5/ 428. 70 7+7.3 +33.-2+7.> ./ . 2/ .3< C . 428. 50 +2 70409/ 26+9 + 5+6427+70 70 / 0/ 92+ 90309+7+ 8+9+ + +92J0,> 08.23 7+ 70-,+9+EF. 7+3 +92J023< . 89.;9+/ + 40/ R 263495E03 50 3F. 010-54+7+3 30506-2+,/ 0640< 5/ + +83 .549+> 08.23 70 010-54+7+ + 892/ 029+ 7033+3 263495E03< . 034+7. 7+3 +92J023 8+33+ + 309 0 708.23 7+ 30;567+ 309J 409-029+ 7033+3 263495E03 C 5/ +
s = a + b;
0340 428. 70 263495EF.< +52,. 50 034J 6. ,+7. 035097. 7. 326+, 70 2;5+, C 30/ 890 5/ + +92J0,> 52,. 50 034J 7. ,+7. 729024. 7. 326+, 70 2;5+, C 5/ + 0189033F.> . 06-.649+9 0340 428. 70 263495EF.< . -./ 854+7.9 0D0-45+ . -J,-5,. 7+ 0189033F. 7. ,+7. 729024. :a + b
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> 83 + 263495EF. 70 +492B52EF. . 034+7. 7+3 +92J023 C I,42/ + 263495EF. 7. 89.;9+/ + C 5/ + .809+EF. 70 03-924+< -./ . .549+3 50 J 2/ .3 +64092.9/ 0640> 89.;9+/ + +-2/ + 3./ + N 6I/ 09.3 264029.3> 0 . 542,2+7.9 2649.7529 5/ 6I/ 09. 90+,< 8.9 010/ 8,.3.7
< . 89.;9+/ + 6F. +2 409 . -./ 8.94+/ 064. 03809+7.> 50 +,409+E03 409A+/ .3 50 D+09 +. 89.;9+/ + 8+9+ 50 D.330 -+8+ 70 3./ + N 6I/ 09.3 90+23 89.;9+/ + 50 +-+B+/ .3 70 09 +8903064+ 5/ + D.940 ,2/ 24+EF.> 0 -+7+ 0 50 5090/ .3 3./ +9 7.23 6I/ 09.3 72D0906403 40/ .3 50 0724+9 . -72;. ++< +,409+9 .3 6I/ 09.3 0 90-./ 82,+9 . 89.;9+/ +> 34+ 3245+EF. 6F. C +-024J 0,> +9+ + 903.,09< 70 0/ .3 70306 ., 09 . 89.;9+/ + 70 4+, D.9/ + 50 0340 3.,2-240 +. 542,2+7.9 .3 6I/ 09.3 + 3./ +9>// Versão 2 da classe Soma2int
import java.util.Scanner;
public class Soma2int {
public static void main(String[] args) {
int a, b, s;
Scanner sc = new Scanner(System.in);
System.out.print(“Primeiro operando: “);
a=sc.nextInt();
System.out.print(“Segundo operando: “);
b=sc.nextInt();
s=a+b;
System.out.print(a + " + " + b + " = " + s );
}
}
I L'"P+
sc.nextInt()
-02-&% %3D /'- + '3#*#,%5+& -0$&-)% '( #"3-#&+ ' 0%"5+ + 3-$*%5+ I 2F0 + '3#*#,%5+& $%&&-?%& "% 3-$*%<enter>
. % L'"P+ &-3+&"% + )%*+& #"3-#&+ *#5+ 0 &-03%"3-0 3#2+0 5- 5%5+0 0P+ *#5+0 &-$+&&-"5+ % L'" -0 0-( -*7%"3-0
Q -L#"% - #"#$#%*#,- % )%)-*
v
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-
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M 0$&-)% '( 2&+?&%( % /'- $+")-&3% ?&%'0 -"3#?&%5+0. . -( ?&%'0 %7&-"7-#3. O B> O
M 0$&-)% '( 2&+?&%( % /'- $%*$'*- + 2-& ( -3&+ 5- '( &-$3"?'*+ 5 -$+( 2&#( -"3+ $ - *%&?'&% *
( % +'3&% "+)#5%5- /'- + 4*3#( + 2&+?&%( % /'- 5-0-")+*)-( +0 %2&-0-"3% D + $+( -"31&#+ #"#$#%*
// Versão 2 da classe Soma2int
( $+( -"31&#+ D '( % #"5#$%P+ 2%&% + 2&+?&%( %5+& 0 $+( -"31&#+0 0P+ *#3-&%*( -"3- #?"+&%5+0 2-*+ $+( 2#*%5+&. ; . "P+ 3 ( /'%*/'-& #"L*' "$#% "% -G-$'P+ 5+ 2&+?&%( % %&% /'- 0-&)-( -"3P+ +0 $+( -"31&#+0 %&% %'5%& + 2&+?&%( %5+& % *-( H&%&0- % 0#. - /'-( ( %#0 3#)-& /'- *-& + 0-' $F5#?+. 5 -%02-$3+0 #( 2+&3%"3-0 3%#0 $+( +. + %'3+& 5+ $F5#?+. + 0-' $+"3%$3+. % )-&0P+ %$3'%*. 5+ -03%5+ 5+ 2&+?&%( % "'( 5-3-&( #"%5+ ( +( -"3+ +' %#"5% 5%0 &%, -0 /'- + *-)%&%( % 3+( %& '( % 5%5% +2P+ Q -03- 2+"3+ 5- )#03% +0 $+( -"31&#+0 0P+ '( % L-&&%( -"3% ( '#3+ #( 2+&3%"3- 2%&% ( -*7+&%& %
; A; 5+ $F5#?+. ; . 2%&% %'( -"3%& % "+00% $%2%$#5%5- 5- $+( 2&--"5-& + $F5#?+
2&+?&%( %P+ M 03- 3#2+ 5- #"L+&( %P+ -031 5#02+" )-* % 3+5+0 - -( )1&#+0 0 3#+0. #"$*'#"5+ "+0 ( %"'%#0 5% *#"?'%?-( - "+ 2&F2&#+ %( H#-"3- 5- 5-0-")+*)#( -"3+
+ $+( -"31&#+ %$#( %. + $+( 2#*%5+& #?"+&% 3'5+ /'%"3+ -03-% 5#&-#3% 5+0 $%&%$3-&-0
//
'3&+ -G-( 2*+ +"5- -03- 3#2+ 5- $+( -"31&#+ 2+5- 0-& ( '#3+ 43#*…
y = x * x +1;
z = Math.sqrt(y); // Note-se que y é sempre maior do que 0
…
C -*-( H&%0- /'- % L'"P+
Math.sqrt(y)
&-3+&"% '(double
$+( % &%#, /'%5&%5% 5-y
- /'- % &%#, /'%5&%5% 0F -031 5-L#"#5% 2%&% +0 "4( -&+0 "P+ "-?%3#)+0 K- "P+ 3#)D00-( +0 % $-&3-,% 5- /'-y
D 0-( 2&- 2+0#3#)+ 3-& %( +0 /'- 3-031*+ %"3-0 5 -$7%( %& % L'"P+ /'- $%*$'*% % &%#, /' %5&%5% K- "P+ + L#,D00-( +0 2+5-& %( +0 3-& '( ;<<= ; ;; =. ; . '( -&&+ /'- %$+"3-$-&#% -"/'%"3+ + 2&+?&%( % -031 -( L'"$#+"%( -"3+%&% %*D( 5+ $+( -"31&#+ 5- *#"7%. /'- )#( +0 %"3-&#+&( -"3-. -03P+ 3%( HD( 5#02+" )-#0 +0 $+( -"31&#+0 5- H*+$+ M 03- 3#2+ 5- $+( -"31&#+ $+( -% 2+&
/*
-%$%H% $+(*/
%3'&%*( -"3- /'- -"3&- + #" $#+ - + L#( 5+ $+( -"31&#+ 2+5-&-( +0 3-& 3%"3%0 *#"7%0 /'%"3%0 %0 "-$-001&#%0. $+( + "+ 0-?'#"3- -G-( 2*+
/* Versão obsoleta da classe Soma2int
public class Soma2int {
public static void main(String[] args) {
int a, b, s;
a=1;
b=2;
s=a+b;
System.out.print(a + " + " + b + " = " + s );
}
}
*/
P+ 2+5-( +0 D 3-& $+( -"31&#+0 5- H*+$+ 5-"3&+ 5- $+( -"31&#+ 5- H*+$+ %&% %*D( 5-03-0
>
3#2+0 5- $+( -"31&#+0 +
-1 /'- L%*%( +0 5- *-?#H#*#5%5- 2+5-( +0 %$&-0$-"3%& 5-05- 1 ( %#0 %*?'"0 2+"3+0 #( 2+&3%"3-0
0 "+( -0 /'- 5-&( +0 0 $*%00-0 - )%)-#0 5-)-( 0-& 3P+ #"L+&( %3#)+0 /'%"3+ 2+00 )-*6
+ $%0+ 5- '( % $*%00-. + 0-' "+( - 5-)- 5%& '( % #"5#$%P+ 3P+ $*%&% - $+"$#0% /'%"3+ 2+00 )-* 5- /'%* D % 0'% &-02+"0%H#*#5%5
- >
+ $%0+ 5- '( % )%)-*. + 0-' "+( - 5-)- #"5#$%& 5- L+&( % $*%&% - $+"$#0%. /'%* + 0#?"#L#$%5+ 5+0 )%*+&-0 "-*% %&( %,-"%5+0
#( 2+&3%"3- "+3%& /'- +0 "+( -0 +' #5-"3#L#$%5+&-0 0P+ 0-( 2& -$+"03#3' 5+0 2+& '( % 0-/' "$#% 5- $%&%$3-&-0 /'- $+( -%( 2+& '( % *-3&% - "P+ 3 ( -02%+0 '%"5+ L+& 43#* ' 0%& 5'%0 +' ( %#0 2%*%)&%0 $+( + #5-"3#L#$%5+& 2+5-( +0 '0%& + $%&1$3-&
_
2%&% '"3%& %0 2%*%)&%0 K -2&-L-&#&( +0 2+5-( +0 #?'%*( -"3- '"3%& %0 )1&#%0 2%*%)&%0 $%2#3%*#,%"5+ % #"#$#%* 5- $%5% '( % I *?'"0 -G-( 2*+0 +"5- -03%0 #"5#$% -0 2+5-( 0-& 43-#0long total_numeros_telefone;
long totalNumerosTelefone;
+ /'- 0- 0-?'- %5+23%&-( +0 % 0-?'#"3- $+")-"P+ +0 "+( -0 5%0 )%)-#0 $+( -%( 2+& ( #"4 0$'*%0 - +0 "+( -0 5%0 $*%00-0 $+( -%( 2+& ( %#4 0$'*%0>
$F5#?+ 5-)- -03%& #"5-"3%5+ +' '03#L#$%5+ 5- 3%* L+&( % /'- 0-% #( -5#%3+ 2%&% + *-#3+& #5-"3#L#$%& + #" $#+ - + L#( 5- $%5% '( 5+0 H*+$+0 5+ $F5#?+
)-%( +0
/* Versão 2 da classe Som2int escrita sem qualquer tipo de preocupação
com legibilidade*/ public class Soma2int {public static void
main(String[]args) {int a, b, s; Scanner sc = new Scanner(System.in);
System.out.print(“Primeiro
operando:“);
a=sc.nextInt();
System.out.print(“Segundo
operando:“);
b=sc.nextInt();
s=a+b;
System.out.print(a + " + " + b + " = " + s );}}
$F5#?+ %$#( % 3-( -G%$3%( -"3- + ( -0( + 0#?"#L#$%5+ 2%&% + $+( 2#*%5+& 5+ /'- + $F5#?+ 5% 2&#( -#&% 21?#"%
+ -"3%"3+. 2%&% "F0 D ( '#3+ ( %#0 5#L $#* 5 -$+( 2&--"5-& K-"5+ % $+( 2&--"0P+ ( %#0 5#L $#* #00+ 3+&"%&#% 3%( HD( ( %#0 5#L $#* % 0'% ( %"'3-"P+. ; . % 0'% -)-"3'%* $+&&-$P+ +' %*3-&%P+
( % -G2&-00P+ D '( % 0-/' "$#% H-( L+&( %5% 5- +2-&%"5+0 - +2-&%5+&-0 &-0'*3%5+ 5% %)%*#%P+ 5- '( % -G2&-00P+ D '( )%*+&
1 )#( +0 %*?'"0 -G-( 2*+0 5 --G2&-00 -0 %( D3#$%0 I -G2&-00P+
a + b
D '( % -G2&-00P+ %( D3#$% -")+*)-"5+ + +2-&%5+& %( D3#$+ 0+( %+
0 +2-&%5+&-0 %( D3#$+0 5#02+" )-#0 -(%)% 0P+ ;<A=<;@ A<: =@ 8 A= ;: =
+, -, *, /, %
2-&% -0 %( D3#$%0 ' 0'%#0. 0-"5+%
+ +2-&%5+& ( F5'*+ /'- &-3+&"% + &-03+ 5% 5#)#0P+ #"3-#&% 5+0 0-' 0 +2-&%"5+0int i = 5 % 2; // i vale 1
++a, --a
!"$&-( -"3+. 5-$&-( -"3+ 2&-L#G+ )%*+& 5% )%)-*a
D #"$&-( -"3%5++' 5-$&-( -"3%5+ - 0F 5-2+#0 D /' -D 5-)+*)#5+
int i, a=0;
i = ++a; // i vale 1, a vale 1
a++, a--
!"$&-( -"3+. 5-$&-( -"3+ 0'L#G+ )%*+& 5% )%)-*a
D 5-)+*)#5+ - 0Fint i, a=0;
5-$&-( -"3%5+ -&3%0 *#"?'%?-"0 $+( + + . - + %)% 5#02+"#H#*#,%( +0 $7%( %5+0 +2-&%5+&-0 5- %'3+%3&#H'#P+ M 03-0 +2-&%5+&-0 0P+ $+")-"#-"3-0 2+& /' -2-&( #3-( '( % -0$% $+"$#0% 5- #"03&' -0 5- %3&#H'#P+ +& -G-( 2*+. % #"03&'P+
a = a * 3;
2+5- 0-& -0$% %H&-)#%5%( -"3- $+( +
a *= 3;
2&#( -#&% )#03%. %0 )%"3%?-"0 2%&-$-( "P+ 0-& ( '#3%0. ( %0 0P+ Q -05- *+?+. % #"03&'P+ %H&-)#%5% D ( %#0 -L#$#-"3- 5+ /'- % +'3&% Q -2+#0 % L+&( % %H&-)#%5%. 2+&/'- ( %#0 0#( 2*-0. 3+&"%0- ( %#0 *-? )-* "+0 $%0+0 "P+ 3&#)#%#0
'3&+0 +2-&%5+&-0 5- %'3+%3&#H'#P+ 5#02+" )-#0 0P+
+=, -=, *=, /=, %=
$'+ 0#?"#L#$%5+ D -)#5-"3-
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%)% 0-% #?'%* %+ &-0'*3%5+ 5% %) %*#%P+ 5% -G2&-00P+ ( %3-( 13#$% $+&&-02+"5-"3- I 00#(
x = 1 + 2 * 3;
%3&#H'# %
x
+ )%*+&7
. 3%* $+( + 0-&#% 5- -02-&%&. 1 /'- -( ( %3-( 13#$% L%,-( 0 -2&#( -#&+ %0 ( '*3#2*#$% -0 - 5#)#0 -0 - 0F 5-2+#0 %0 0+( %0 - 0'H3&%$ -0 N%( HD( . 3%* $+( -(
%3-( 13#$%. 2+5-( +0 ' 0%& 2%& "3-0#0 $'&)+0 2%&% %*3-&%& 2&#+%5-0 - "'( % -G2&-00P+ $+( )1&#+0 +2-&%5+&-0 %( D3#$+0. 3+5+0 $+( % ( -0( % 2&#+%5-. %)%*#%0- % -G2&-00P+ 5% -0/'-&5% 2%&% % 5#&-#3%
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+"'"P+ +' -*F?#$+ I ( H+0 +0 +2-&%5+&-0 &-3+&"%(true
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6 &-3+&"%(false
$%0+ $+"3&1&#+ +2-&%5+&&
%)%*#% 0-( 2&- %( H+0 +0 +2-&%"5+0 +2-&%5+&&&
0F %)%*#% + 0-?'"5+ +2-&%"5+ 0- "-$-001&#+. ; . 0- + 2&#( -#&+ +2-&%"5+ L+&true
boolean a = true, b =
false, c;
c = a && b; // c vale false
|, ||
Q #0'"P+ +' +'*F?#$+ I ( H+0 +0 +2-&%5+&-0 &-3+&"%(false
0- 0F 0 -%( H+0 +0 +2-&%"5+ L+&-(false
6 &-3+&"%true
$%0+ $+"3&1&#+ +2-&%5+&||
0F %)%*#% + 0-?'"5+ +2-&%"5+ 0- "-$-001&#+. ; . 0- + +2-&%"5+ -0/'-&5+ L+&false
boolean a = true, b =
false, c;
c = a || b; // c vale true
^
'-G$*'0#)+ C -3+&"% 3&'- 0- - 0F 0 -+0 0-'0 %&?'( -"3+0 3#)-&-( )%*+&-0 *F?#$+0 5#L-&-"3-06 C -3+&"% L%*0- $%0+ $+"3&1&#+boolean a = true, b = true,
c;
c = a ^ b; // c vale false
!
-?%P+ 2-&%5+& '"1&#+ I "-?%P+ 5- L%*0- D 3&'- - % "-?%P+ 5- 3&'- D L%*0
-boolean a= true, c;
c = !a; // c vale false
;<A=<;@ <; A=8A@ 8 A= ;: =
<
+2-&%"5+ -0/'-&5+ L+& ( -"+& 5+ /'- +2-&%"5+ 5#&-#3+6 &-3+&"%
false
$%0+ $+"3&1&#+float f = 1.0f;
boolean b = (i < f); // b
vale true
<=
-"+& +' #?'%* C -3+&"%
true
0- - 0F 0- + +2-&%"5+ -0/'-&5+ L+& ( -"+& +' #?'%* %+ +2-&%"5+ 5#&-#3+6 &-3+&"%false
$%0+ $+"3&1&#+int i = 1;
double d = 0.0;
boolean b = (i <= d); // b
vale false
>
%#+& C -3+&"%
true
0- - 0F 0- + +2-&%"5+ -0/'-&5+ L+& ( %#+& 5+ /' -+2-&%"5+ 5#&-#3+6 &-3+&"%false
$%0+ $+"3&1&#+short s = 10;
int i = 1;
boolean b = (s > i); // b
vale true
>=
%#+& +' #?'%* C-3+&"%
true
0- - 0F 0- + +2-&%"5+ -0/'-&5+ L+& ( %#+& +' #?'%* %+ +2-&%"5+ 5#&-#3+6 &-3+&"%false
$%0+ $+"3&1&#+short s = 10;
int i = 10;
boolean b = (s <= i); // b
vale true
==
!?'%* P+ $+"L'"5#& $+( + +2-&%5+& %3&#H'#P+=
C -3+&"%true
0- - 0F 0- %( H+0 +0 +2-&%"5+0 L+&-( #?'%#06 &-3+&"%false
. $%0+ $+"3&1&#+short s = 0x10;
int i = 16;
boolean b = (s = i); // b
vale true
!=
Q #L-&-"3- C -3+&"%true
0- - 0F 0 -%( H+0 +0 +2-&%"5+0 L+&-( 5#L-&-"3-06 &-3+&"%false
. $%0+ $+"3&1&#+int i = 1;
float f = 1.0f;
boolean b = (i != f); // b
vale false
'%#0 0P+ +0 &-0'*3%5+0 ( +03&%5+0 2-*%0 0-?'#"3-0 #"03&' -0
a)
int x;
i)
x = -3+4*5–6; System.out.println(x);
ii)
x = -3 *4 %–6; System.out.println(x);
iii)
x = (7 + 6) % 5 / 2; System.out.println(x);
b)
int x = 2, y, z;
i)
x *= 3 + 2; System.out.println(x);
ii)
x *= y = z = 4; System.out.println(x);
iii)
x = y == z; System.out.println(x);
> Q %5%0 %0 0-?'#"3-0 %3&#H'# -0byte umByte = 10;
boolean a=false, b=false;
%*$'*- + )%*+& 5%0 0-?'#"3-0 -G2&-00 -0 *F?#$%0
a)
(umByte > 10) && !a
b)
(!a^b) && (a || !b)
c)
!(a || b) == (!a && !b)
B
M 0$&-)% '( % -G2&-00P+ /'- 2-&( #3% )-&#L#$%& 0- + )%*+& 5% )%)-*
x
D 2+0#3#)+ ( %0 ( -"+& 5+
J
M 0$&-)% '( % -G2&-00P+ /'- 2-&( #3% )-&#L#$%& 0- '( 5%5+ #"3-#&+ D 2%& +' #( 2%&
