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VCVC
&&
BBBB
11
N?i dung
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
C?u l?nh ?i?u ki?n if1
C?u l?nh r? nh¨¢nh switch2
M?t s? kinh nghi?m l?p tr¨¬nh3
M?t s? v¨ª d? minh h?a4
VCVC
&&
BBBB
22
<L?nh 1>
C?u l?nh if (thi?u)
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
?
S
<BT Logic>
if (<BT Logic>)
<L?nh 1>; C?u l?nh ??n ho?c
C?u l?nh ph?c (k?p
gi?a { v¨¤ })
Trong ( ), cho k?t qu?
(sai = 0, ?¨²ng ¡Ù 0)
VCVC
&&
BBBB
33
C?u l?nh if (thi?u)
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
void main()
{
if (a == 0)
printf(¡°a bang 0¡±);
if (a == 0)
{
printf(¡°a bang 0¡±);
a = 2912;
}
}
VCVC
&&
BBBB
44
<L?nh 1>
C?u l?nh if (??)
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
<L?nh 2>
?
S
<BT Logic>
if (<BT Logic>)
<L?nh 1>;
else
<L?nh 2>;
C?u l?nh ??n ho?c
C?u l?nh ph?c (k?p
gi?a { v¨¤ })
Trong ( ), cho k?t qu?
(sai = 0, ?¨²ng ¡Ù 0)
VCVC
&&
BBBB
55
C?u l?nh if (??)
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
void main()
{
if (a == 0)
printf(¡°a bang 0¡±);
else
printf(¡°a khac 0¡±);
if (a == 0)
{
printf(¡°a bang 0¡±);
a = 2912;
}
else
printf(¡°a khac 0¡±);
}
VCVC
&&
BBBB
66
C?u l?nh if - M?t s? l?u ?
?C?u l?nh if v¨¤ c?u l?nh if¡­ else l¨¤ m?t c?u l?nh
??n.
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
VCVC
&&
BBBB
77
C?u l?nh if - M?t s? l?u ?
?C?u l?nh if c¨® th? l?ng v¨¤o nhau v¨¤ else s?
t??ng ?ng v?i if g?n n¨® nh?t.
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
if (a != 0)
if (b > 0)
printf(¡°a != 0 va b > 0¡±);
else
printf(¡°a != 0 va b <= 0¡±);
if (a !=0)
{
if (b > 0)
printf(¡°a != 0 va b > 0¡±);
else
printf(¡°a != 0 va b <= 0¡±);
}
VCVC
&&
BBBB
88
C?u l?nh if - M?t s? l?u ?
?N¨ºn d¨´ng else ?? lo?i tr? tr??ng h?p.
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
if (delta < 0)
printf(¡°PT vo nghiem¡±);
if (delta == 0)
printf(¡°PT co nghiem kep¡±);
if (delta > 0)
printf(¡°PT co 2 nghiem¡±);
if (delta < 0)
printf(¡°PT vo nghiem¡±);
else // delta >= 0
if (delta == 0)
printf(¡°PT co nghiem kep¡±);
else
printf(¡°PT co 2 nghiem¡±);
VCVC
&&
BBBB
99
C?u l?nh if - M?t s? l?u ?
?Kh?ng ???c th¨ºm ; sau ?i?u ki?n c?a if.
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
void main()
{
int a = 0;
if (a != 0)
printf(¡°a khac 0.¡±);
if (a != 0);
printf(¡°a khac 0.¡±);
if (a != 0)
{
};
printf(¡°a khac 0.¡±);
}
VCVC
&&
BBBB
1010
C?u l?nh switch (thi?u)
switch (<Bi?n/BT>)
{
case <GT1>:<L1>;break;
case <GT2>:<L2>;break;
¡­
}
?<Bi?n/BT> l¨¤
bi?n/bi?u th?c cho gi¨¢
tr? r?i r?c.
?<L?nh> : ??n ho?c
kh?i l?nh {}.
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
<L?nh 1>
?
S
<Bi?n/BT>
= <GT1>
<Bi?n/BT>
= <GT2>
<L?nh 2>
?
S
VCVC
&&
BBBB
1111
C?u l?nh switch (thi?u)
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
void main()
{
int a;
printf(¡°Nhap a: ¡±);
scanf(¡°%d¡±, &a);
switch (a)
{
case 1 : printf(¡°Mot¡±); break;
case 2 : printf(¡°Hai¡±); break;
case 3 : printf(¡°Ba¡±); break;
}
}
VCVC
&&
BBBB
1212
C?u l?nh switch (??)
switch (<Bi?n/BT>)
{
<GT1>:<L?nh 1>;break;
<GT2>:<L?nh 2>;break;
¡­
default:
<L?nh n>;
}
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
<L?nh 1>
?
S
<Bi?n/BT>
= <GT1>
<Bi?n/BT>
= <GT2>
<L?nh 2>
?
S
<L?nh n>
VCVC
&&
BBBB
1313
C?u l?nh switch (??)
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
void main()
{
int a;
printf(¡°Nhap a: ¡±);
scanf(¡°%d¡±, &a);
switch (a)
{
case 1 : printf(¡°Mot¡±); break;
case 2 : printf(¡°Hai¡±); break;
case 3 : printf(¡°Ba¡±); break;
default : printf(¡°Ko biet doc¡±);
}
}
VCVC
&&
BBBB
1414
C?u l?nh switch - M?t s? l?u ?
?C?u l?nh switch l¨¤ m?t c?u l?nh ??n v¨¤ c¨® th?
l?ng nhau.
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
VCVC
&&
BBBB
1515
C?u l?nh switch - M?t s? l?u ?
?C¨¢c gi¨¢ tr? trong m?i tr??ng h?p ph?i kh¨¢c
nhau.
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
switch (a)
{
case 1 : printf(¡°Mot¡±); break;
case 1 : printf(¡°MOT¡±); break;
case 2 : printf(¡°Hai¡±); break;
case 3 : printf(¡°Ba¡±); break;
case 1 : printf(¡°1¡±); break;
case 1 : printf(¡°mot¡±); break;
default : printf(¡°Khong biet doc¡±);
}
VCVC
&&
BBBB
1616
C?u l?nh switch - M?t s? l?u ?
?switch s? nh?y ??n case t??ng ?ng v¨¤ th?c
hi?n ??n khi n¨¤o g?p break ho?c cu?i switch s?
k?t th¨²c.
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
VCVC
&&
BBBB
1717
C?u l?nh switch - M?t s? l?u ?
?switch nh?y ??n case t??ng ?ng v¨¤ th?c hi?n
??n khi n¨¤o g?p break ho?c cu?i switch s? k?t
th¨²c.
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
VCVC
&&
BBBB
1818
C?u l?nh switch - M?t s? l?u ?
?T?n d?ng t¨ªnh ch?t khi b? break;
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
VCVC
&&
BBBB
1919
? C?u l?nh if ? C?u l?nh switch
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
Kinh nghi?m l?p tr¨¬nh
if (a == 1)
printf(¡°Mot¡±);
if (a == 2)
printf(¡°Hai¡±);
if (a == 3)
printf(¡°Ba¡±);
if (a == 4)
printf(¡°Bon¡±);
if (a == 5)
printf(¡°Nam¡±);
switch (a)
{
case 1: printf(¡°Mot¡±);
break;
case 2: printf(¡°Hai¡±);
break;
case 3: printf(¡°Ba¡±);
break;
case 4: printf(¡°Bon¡±);
break;
case 5: printf(¡°Nam¡±);
}
VCVC
&&
BBBB
2020
? C?u l?nh switch ? C?u l?nh if
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
Kinh nghi?m l?p tr¨¬nh
if (a == 3.14)
printf(¡°OK¡±);
if (a < 10)
printf(¡°OK¡±);
if (a == 1)
printf(¡°OK¡±);
if (a == 2 || a == 3)
printf(¡°OK¡±);
VCVC
&&
BBBB
2121
B¨¤i t?p th?c h¨¤nh
1. Nh?p m?t s? b?t k?. H?y ??c gi¨¢ tr? c?a s?
nguy¨ºn ?¨® n?u n¨® c¨® gi¨¢ tr? t? 1 ??n 9, ng??c
l?i th?ng b¨¢o kh?ng ??c ???c.
2. Nh?p m?t ch? c¨¢i. N?u l¨¤ ch? th??ng th¨¬ ??i
sang ch? hoa, ng??c l?i ??i sang ch? th??ng.
3. Gi?i ph??ng tr¨¬nh b?c nh?t ax + b = 0.
4. Gi?i ph??ng tr¨¬nh b?c hai ax2
+ bx + c = 0.
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
VCVC
&&
BBBB
2222
B¨¤i t?p th?c h¨¤nh
5. Nh?p 4 s? nguy¨ºn a, b, c v¨¤ d. T¨¬m s? c¨® gi¨¢ tr?
nh? nh?t (min).
6. Nh?p 4 s? nguy¨ºn a, b, c v¨¤ d. H?y s?p x?p gi¨¢
tr? c?a 4 s? nguy¨ºn n¨¤y theo th? t? t?ng d?n.
7. T¨ªnh ti?n ?i taxi t? s? km nh?p v¨¤o. Bi?t:
a. 1 km ??u gi¨¢ 15000?
b. T? km th? 2 ??n km th? 5 gi¨¢ 13500?
c. T? km th? 6 tr? ?i gi¨¢ 11000?
d. N?u tr¨ºn 120km ???c gi?m 10% t?ng ti?n.
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
VCVC
&&
BBBB
2323
B¨¤i t?p th?c h¨¤nh
8. Nh?p v¨¤o th¨¢ng v¨¤ n?m. Cho bi?t th¨¢ng ?¨® c¨®
bao nhi¨ºu ng¨¤y.
9. Nh?p ?? d¨¤i 3 c?nh 1 tam gi¨¢c. Ki?m tra ?¨® c¨®
ph?i l¨¤ tam gi¨¢c kh?ng v¨¤ l¨¤ tam gi¨¢c g¨¬?
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
VCVC
&&
BBBB
2424
B¨¤i t?p 1 (if)
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
#include <stdio.h>
void main()
{
int n;
printf(¡°Nhap mot so nguyen: ¡±);
scanf(¡°%d¡±, &n);
if (n == 1)
printf(¡°Mot¡±);
else
if (n == 2)
printf(¡°Hai¡±);
¡­
else
printf(¡°Khong biet doc¡±);
}
VCVC
&&
BBBB
2525
B¨¤i t?p 1 (switch)
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
#include <stdio.h>
void main()
{
int n;
printf(¡°Nhap mot so nguyen: ¡±);
scanf(¡°%d¡±, &n);
switch (n)
{
case 1: printf(¡°Mot¡±); break;
case 2: printf(¡°Hai¡±); break;
case 3: printf(¡°Ba¡±); break;
¡­
default: printf(¡°Ko biet doc¡±);
}
}
VCVC
&&
BBBB
2626
B¨¤i t?p 2
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
#include <stdio.h>
void main()
{
char ch;
printf(¡°Nhap mot ky tu: ¡±);
scanf(¡°%c¡±, &ch);
if (ch >= ¡®a¡¯ && ch <= ¡®z¡¯)
ch = ch ¨C 32;
else
if (ch >= ¡®A¡¯ && ch <= ¡®Z¡¯)
ch = ch + 32;
printf(¡°Ky tu sau khi doi: %c¡±, ch);
}
VCVC
&&
BBBB
2727
B¨¤i t?p 3
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
#include <stdio.h>
#include <conio.h>
void main()
{
int a, b;
printf(¡°Nhap a, b: ¡±);
scanf(¡°%d%d¡±, &a, &b);
if (a == 0)
if (b == 0)
printf(¡°Phuong trinh VSN¡±);
else
printf(¡°Phuong trinh VN¡±);
else
printf(¡°Nghiem = %f¡±, float(-b)/a);
}
VCVC
&&
BBBB
2828
B¨¤i t?p 4
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
#include <stdio.h>
void main()
{
int a, b, c;
printf(¡°Nhap a, b, c: ¡±);
scanf(¡°%d%d%d¡±, &a, &b, &c);
if (a == 0)
{
// Giai PT Bac 1 o day
}
else
{
// Giai PT Bac 2 o day
}
}
VCVC
&&
BBBB
2929
B¨¤i t?p 5
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
#include <stdio.h>
void main()
{
int a, b, c, d, min;
printf(¡°Nhap a, b, c, d: ¡±);
scanf(¡°%d%d%d%d¡±, &a, &b, &c, &d);
min = a;
if (b < min) min = b;
if (c < min) min = c;
if (d < min) min = d;
printf(¡°So nho nhat la %d¡±, min);
}
VCVC
&&
BBBB
3030
B¨¤i t?p 6
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
#include <stdio.h>
void main()
{
int a, b, c, d, tam;
printf(¡°Nhap a, b, c, d: ¡±);
scanf(¡°%d%d%d%d¡±, &a, &b, &b, &d);
if (a > b)
{ tam = a; a = b; b = tam; }
¡­
printf(¡°Cac so theo thu tu tang dan: ¡±);
printf(¡°%d %d %d %d¡±, a, b, c, d);
}
VCVC
&&
BBBB
3131
B¨¤i t?p 7
?N¨ºn khai b¨¢o h?ng s? l?u gi¨¢ ti?n v¨¤ km
? #define G1 15000
? #define G2 13500
? #define G3 11000
?C¨¢ch t¨ªnh ti?n d?a tr¨ºn s? km n
? n = 1 ? T = G1
? 2 ¡Ü n ¡Ü 5 ? T = G1 + (n ¨C 1)*G2;
? n > 5 ? T = G1 + 4*G2 + (n ¨C 1 ¨C 4)*G3;
?n > 120 ? T = T*0.9;
NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh

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Nmlt c04 cau_lenhdieukienvarenhanh

  • 1. VCVC && BBBB 11 N?i dung NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh C?u l?nh ?i?u ki?n if1 C?u l?nh r? nh¨¢nh switch2 M?t s? kinh nghi?m l?p tr¨¬nh3 M?t s? v¨ª d? minh h?a4
  • 2. VCVC && BBBB 22 <L?nh 1> C?u l?nh if (thi?u) NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh ? S <BT Logic> if (<BT Logic>) <L?nh 1>; C?u l?nh ??n ho?c C?u l?nh ph?c (k?p gi?a { v¨¤ }) Trong ( ), cho k?t qu? (sai = 0, ?¨²ng ¡Ù 0)
  • 3. VCVC && BBBB 33 C?u l?nh if (thi?u) NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh void main() { if (a == 0) printf(¡°a bang 0¡±); if (a == 0) { printf(¡°a bang 0¡±); a = 2912; } }
  • 4. VCVC && BBBB 44 <L?nh 1> C?u l?nh if (??) NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh <L?nh 2> ? S <BT Logic> if (<BT Logic>) <L?nh 1>; else <L?nh 2>; C?u l?nh ??n ho?c C?u l?nh ph?c (k?p gi?a { v¨¤ }) Trong ( ), cho k?t qu? (sai = 0, ?¨²ng ¡Ù 0)
  • 5. VCVC && BBBB 55 C?u l?nh if (??) NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh void main() { if (a == 0) printf(¡°a bang 0¡±); else printf(¡°a khac 0¡±); if (a == 0) { printf(¡°a bang 0¡±); a = 2912; } else printf(¡°a khac 0¡±); }
  • 6. VCVC && BBBB 66 C?u l?nh if - M?t s? l?u ? ?C?u l?nh if v¨¤ c?u l?nh if¡­ else l¨¤ m?t c?u l?nh ??n. NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
  • 7. VCVC && BBBB 77 C?u l?nh if - M?t s? l?u ? ?C?u l?nh if c¨® th? l?ng v¨¤o nhau v¨¤ else s? t??ng ?ng v?i if g?n n¨® nh?t. NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh if (a != 0) if (b > 0) printf(¡°a != 0 va b > 0¡±); else printf(¡°a != 0 va b <= 0¡±); if (a !=0) { if (b > 0) printf(¡°a != 0 va b > 0¡±); else printf(¡°a != 0 va b <= 0¡±); }
  • 8. VCVC && BBBB 88 C?u l?nh if - M?t s? l?u ? ?N¨ºn d¨´ng else ?? lo?i tr? tr??ng h?p. NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh if (delta < 0) printf(¡°PT vo nghiem¡±); if (delta == 0) printf(¡°PT co nghiem kep¡±); if (delta > 0) printf(¡°PT co 2 nghiem¡±); if (delta < 0) printf(¡°PT vo nghiem¡±); else // delta >= 0 if (delta == 0) printf(¡°PT co nghiem kep¡±); else printf(¡°PT co 2 nghiem¡±);
  • 9. VCVC && BBBB 99 C?u l?nh if - M?t s? l?u ? ?Kh?ng ???c th¨ºm ; sau ?i?u ki?n c?a if. NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh void main() { int a = 0; if (a != 0) printf(¡°a khac 0.¡±); if (a != 0); printf(¡°a khac 0.¡±); if (a != 0) { }; printf(¡°a khac 0.¡±); }
  • 10. VCVC && BBBB 1010 C?u l?nh switch (thi?u) switch (<Bi?n/BT>) { case <GT1>:<L1>;break; case <GT2>:<L2>;break; ¡­ } ?<Bi?n/BT> l¨¤ bi?n/bi?u th?c cho gi¨¢ tr? r?i r?c. ?<L?nh> : ??n ho?c kh?i l?nh {}. NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh <L?nh 1> ? S <Bi?n/BT> = <GT1> <Bi?n/BT> = <GT2> <L?nh 2> ? S
  • 11. VCVC && BBBB 1111 C?u l?nh switch (thi?u) NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh void main() { int a; printf(¡°Nhap a: ¡±); scanf(¡°%d¡±, &a); switch (a) { case 1 : printf(¡°Mot¡±); break; case 2 : printf(¡°Hai¡±); break; case 3 : printf(¡°Ba¡±); break; } }
  • 12. VCVC && BBBB 1212 C?u l?nh switch (??) switch (<Bi?n/BT>) { <GT1>:<L?nh 1>;break; <GT2>:<L?nh 2>;break; ¡­ default: <L?nh n>; } NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh <L?nh 1> ? S <Bi?n/BT> = <GT1> <Bi?n/BT> = <GT2> <L?nh 2> ? S <L?nh n>
  • 13. VCVC && BBBB 1313 C?u l?nh switch (??) NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh void main() { int a; printf(¡°Nhap a: ¡±); scanf(¡°%d¡±, &a); switch (a) { case 1 : printf(¡°Mot¡±); break; case 2 : printf(¡°Hai¡±); break; case 3 : printf(¡°Ba¡±); break; default : printf(¡°Ko biet doc¡±); } }
  • 14. VCVC && BBBB 1414 C?u l?nh switch - M?t s? l?u ? ?C?u l?nh switch l¨¤ m?t c?u l?nh ??n v¨¤ c¨® th? l?ng nhau. NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
  • 15. VCVC && BBBB 1515 C?u l?nh switch - M?t s? l?u ? ?C¨¢c gi¨¢ tr? trong m?i tr??ng h?p ph?i kh¨¢c nhau. NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh switch (a) { case 1 : printf(¡°Mot¡±); break; case 1 : printf(¡°MOT¡±); break; case 2 : printf(¡°Hai¡±); break; case 3 : printf(¡°Ba¡±); break; case 1 : printf(¡°1¡±); break; case 1 : printf(¡°mot¡±); break; default : printf(¡°Khong biet doc¡±); }
  • 16. VCVC && BBBB 1616 C?u l?nh switch - M?t s? l?u ? ?switch s? nh?y ??n case t??ng ?ng v¨¤ th?c hi?n ??n khi n¨¤o g?p break ho?c cu?i switch s? k?t th¨²c. NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
  • 17. VCVC && BBBB 1717 C?u l?nh switch - M?t s? l?u ? ?switch nh?y ??n case t??ng ?ng v¨¤ th?c hi?n ??n khi n¨¤o g?p break ho?c cu?i switch s? k?t th¨²c. NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
  • 18. VCVC && BBBB 1818 C?u l?nh switch - M?t s? l?u ? ?T?n d?ng t¨ªnh ch?t khi b? break; NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
  • 19. VCVC && BBBB 1919 ? C?u l?nh if ? C?u l?nh switch NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh Kinh nghi?m l?p tr¨¬nh if (a == 1) printf(¡°Mot¡±); if (a == 2) printf(¡°Hai¡±); if (a == 3) printf(¡°Ba¡±); if (a == 4) printf(¡°Bon¡±); if (a == 5) printf(¡°Nam¡±); switch (a) { case 1: printf(¡°Mot¡±); break; case 2: printf(¡°Hai¡±); break; case 3: printf(¡°Ba¡±); break; case 4: printf(¡°Bon¡±); break; case 5: printf(¡°Nam¡±); }
  • 20. VCVC && BBBB 2020 ? C?u l?nh switch ? C?u l?nh if NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh Kinh nghi?m l?p tr¨¬nh if (a == 3.14) printf(¡°OK¡±); if (a < 10) printf(¡°OK¡±); if (a == 1) printf(¡°OK¡±); if (a == 2 || a == 3) printf(¡°OK¡±);
  • 21. VCVC && BBBB 2121 B¨¤i t?p th?c h¨¤nh 1. Nh?p m?t s? b?t k?. H?y ??c gi¨¢ tr? c?a s? nguy¨ºn ?¨® n?u n¨® c¨® gi¨¢ tr? t? 1 ??n 9, ng??c l?i th?ng b¨¢o kh?ng ??c ???c. 2. Nh?p m?t ch? c¨¢i. N?u l¨¤ ch? th??ng th¨¬ ??i sang ch? hoa, ng??c l?i ??i sang ch? th??ng. 3. Gi?i ph??ng tr¨¬nh b?c nh?t ax + b = 0. 4. Gi?i ph??ng tr¨¬nh b?c hai ax2 + bx + c = 0. NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
  • 22. VCVC && BBBB 2222 B¨¤i t?p th?c h¨¤nh 5. Nh?p 4 s? nguy¨ºn a, b, c v¨¤ d. T¨¬m s? c¨® gi¨¢ tr? nh? nh?t (min). 6. Nh?p 4 s? nguy¨ºn a, b, c v¨¤ d. H?y s?p x?p gi¨¢ tr? c?a 4 s? nguy¨ºn n¨¤y theo th? t? t?ng d?n. 7. T¨ªnh ti?n ?i taxi t? s? km nh?p v¨¤o. Bi?t: a. 1 km ??u gi¨¢ 15000? b. T? km th? 2 ??n km th? 5 gi¨¢ 13500? c. T? km th? 6 tr? ?i gi¨¢ 11000? d. N?u tr¨ºn 120km ???c gi?m 10% t?ng ti?n. NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
  • 23. VCVC && BBBB 2323 B¨¤i t?p th?c h¨¤nh 8. Nh?p v¨¤o th¨¢ng v¨¤ n?m. Cho bi?t th¨¢ng ?¨® c¨® bao nhi¨ºu ng¨¤y. 9. Nh?p ?? d¨¤i 3 c?nh 1 tam gi¨¢c. Ki?m tra ?¨® c¨® ph?i l¨¤ tam gi¨¢c kh?ng v¨¤ l¨¤ tam gi¨¢c g¨¬? NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh
  • 24. VCVC && BBBB 2424 B¨¤i t?p 1 (if) NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh #include <stdio.h> void main() { int n; printf(¡°Nhap mot so nguyen: ¡±); scanf(¡°%d¡±, &n); if (n == 1) printf(¡°Mot¡±); else if (n == 2) printf(¡°Hai¡±); ¡­ else printf(¡°Khong biet doc¡±); }
  • 25. VCVC && BBBB 2525 B¨¤i t?p 1 (switch) NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh #include <stdio.h> void main() { int n; printf(¡°Nhap mot so nguyen: ¡±); scanf(¡°%d¡±, &n); switch (n) { case 1: printf(¡°Mot¡±); break; case 2: printf(¡°Hai¡±); break; case 3: printf(¡°Ba¡±); break; ¡­ default: printf(¡°Ko biet doc¡±); } }
  • 26. VCVC && BBBB 2626 B¨¤i t?p 2 NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh #include <stdio.h> void main() { char ch; printf(¡°Nhap mot ky tu: ¡±); scanf(¡°%c¡±, &ch); if (ch >= ¡®a¡¯ && ch <= ¡®z¡¯) ch = ch ¨C 32; else if (ch >= ¡®A¡¯ && ch <= ¡®Z¡¯) ch = ch + 32; printf(¡°Ky tu sau khi doi: %c¡±, ch); }
  • 27. VCVC && BBBB 2727 B¨¤i t?p 3 NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh #include <stdio.h> #include <conio.h> void main() { int a, b; printf(¡°Nhap a, b: ¡±); scanf(¡°%d%d¡±, &a, &b); if (a == 0) if (b == 0) printf(¡°Phuong trinh VSN¡±); else printf(¡°Phuong trinh VN¡±); else printf(¡°Nghiem = %f¡±, float(-b)/a); }
  • 28. VCVC && BBBB 2828 B¨¤i t?p 4 NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh #include <stdio.h> void main() { int a, b, c; printf(¡°Nhap a, b, c: ¡±); scanf(¡°%d%d%d¡±, &a, &b, &c); if (a == 0) { // Giai PT Bac 1 o day } else { // Giai PT Bac 2 o day } }
  • 29. VCVC && BBBB 2929 B¨¤i t?p 5 NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh #include <stdio.h> void main() { int a, b, c, d, min; printf(¡°Nhap a, b, c, d: ¡±); scanf(¡°%d%d%d%d¡±, &a, &b, &c, &d); min = a; if (b < min) min = b; if (c < min) min = c; if (d < min) min = d; printf(¡°So nho nhat la %d¡±, min); }
  • 30. VCVC && BBBB 3030 B¨¤i t?p 6 NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh #include <stdio.h> void main() { int a, b, c, d, tam; printf(¡°Nhap a, b, c, d: ¡±); scanf(¡°%d%d%d%d¡±, &a, &b, &b, &d); if (a > b) { tam = a; a = b; b = tam; } ¡­ printf(¡°Cac so theo thu tu tang dan: ¡±); printf(¡°%d %d %d %d¡±, a, b, c, d); }
  • 31. VCVC && BBBB 3131 B¨¤i t?p 7 ?N¨ºn khai b¨¢o h?ng s? l?u gi¨¢ ti?n v¨¤ km ? #define G1 15000 ? #define G2 13500 ? #define G3 11000 ?C¨¢ch t¨ªnh ti?n d?a tr¨ºn s? km n ? n = 1 ? T = G1 ? 2 ¡Ü n ¡Ü 5 ? T = G1 + (n ¨C 1)*G2; ? n > 5 ? T = G1 + 4*G2 + (n ¨C 1 ¨C 4)*G3; ?n > 120 ? T = T*0.9; NMLT - C?u l?nh ?i?u ki?n v¨¤ r? nh¨¢nh