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Ⱥɪɢɮɦɟɬɢɱɟɫɤɢɟ ɨɩɟɪɚɰɢɢ
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11.5. Ⱥɪɢɮɦɟɬɢɱɟɫɤɢɟ ɨɩɟɪɚɰɢɢ
Ɋɚɫɫɦɨɬɪɢɦ ɫɤɪɢɩɬ, ɤɨɬɨɪɵɣ ɜɵɩɨɥɧɹɟɬ ɚɪɢɮɦɟɬɢɱɟɫɤɢɟ ɨɩɟɪɚɰɢɢ
ɧɚɞ ɞɜɭɦɹ ɱɢɫɥɚɦɢ (x=8 ɢ z=3) ɢ ɜɵɜɨɞɢɬ ɪɟɡɭɥɶɬɚɬɵ ɧɚ ɷɤɪɚɧ ɞɢɫɩɥɟɹ.
Ɋɟɡɭɥɶɬɚɬ ɫɥɨɠɟɧɢɹ: x + z = 11
Ɋɟɡɭɥɶɬɚɬ ɜɵɱɢɬɚɧɢɹ: x - z = 5
Ɋɟɡɭɥɶɬɚɬ ɭɦɧɨɠɟɧɢɹ: x * z = 24
Ɋɟɡɭɥɶɬɚɬ ɞɟɥɟɧɢɹ: x / z = 2.6666666666666665
Ɋɟɡɭɥɶɬɚɬ ɰɟɥɨɱɢɫɥɟɧɧɨɝɨ ɞɟɥɟɧɢɹ: x % z = 2
Ɋɟɡɭɥɶɬɚɬ ɢɧɤɪɟɦɟɧɬɚ x : ++x = 9
Ɋɟɡɭɥɶɬɚɬ ɞɟɤɪɟɦɟɧɬɚ z : --z = 2
Ɋɟɡɭɥɶɬɚɬ ɫɥɨɠɟɧɢɹ x + = z. ɉɨɫɥɟ ɜɵɩɨɥɧɟɧɢɹ ɨɩɟɪɚɰɢɢ x= 11
Ʉɨɞ ɩɪɨɝɪɚɦɦɵ ɩɪɢɜɟɞɟɧ ɧɢɠɟ:
<script language="JavaScript">
x=8;
z=3;
yAdd=x+z;
ySub=x-z;
yMult=x*z;
yDiv=x/z;
yMod=x%z;
yInkr=++x;
yDekr=--z;
x+=z;
document.write("Ɋɟɡɭɥɶɬɚɬ ɫɥɨɠɟɧɢɹ: x + z = "+yAdd+"<br>");
document.write("Ɋɟɡɭɥɶɬɚɬ ɜɵɱɢɬɚɧɢɹ: x - z = "+ySub+"<br>");
document.write("Ɋɟɡɭɥɶɬɚɬ ɭɦɧɨɠɟɧɢɹ: x * z = "+yMult+"<br>");
ent.write("Ɋɟɡɭɥɶɬɚɬ ɞɟɥɟɧɢɹ: x / z = "+yDiv+"<br>");
docum
ent.write("Ɋɟɡɭɥɶɬɚɬ ɰɟɥɨɱɢɫɥɟɧɧɨɝɨ ɞɟɥɟɧɢɹ: x % z =
docum
"+yMod+"<br>");
document.write("Ɋɟɡɭɥɶɬɚɬ ɢɧɤɪɟɦɟɧɬɚ x : ++x = "+yInkr+"<br>");
document.write("Ɋɟɡɭɥɶɬɚɬ ɞɟɤɪɟɦɟɧɬɚ z : --z = "+yDekr+"<br>");
document.write("Ɋɟɡɭɥɶɬɚɬ ɫɥɨɠɟɧɢɹ x + = z. ɉɨɫɥɟ ɜɵɩɨɥɧɟɧɢɹ ɨɩɟ-
ɪɚɰɢɢ x= "+x+"<br>");
</script>
Ⱦɚɞɢɦ ɤɪɚɬɤɢɟ ɩɨɹɫɧɟɧɢɹ ɞɥɹ ɧɟɤɨɬɨɪɵɯ ɨɩɟɪɚɰɢɣ. ɐɟɥɨɱɢɫɥɟɧɧɨɟ
ɞɟɥɟɧɢɟ ɩɨ-ɞɪɭɝɨɦɭ ɧɚɡɵɜɚɟɬɫɹ ɨɩɟɪɚɰɢɟɣ ɧɚɯɨɠɞɟɧɢɹ ɨɫɬɚɬɤɚ (ɢɥɢ ɞɟɥɟɧɢɟɦ ɩɨ ɦɨɞɭɥɸ). ɇɚɩɪɢɦɟɪ, ɟɫɥɢ ɱɢɫɥɨ 15 ɰɟɥɨɱɢɫɥɟɧɧɨ ɪɚɡɞɟɥɢɬɶ ɧɚ 4, ɬɨ
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Ⱥɪɢɮɦɟɬɢɱɟɫɤɢɟ ɨɩɟɪɚɰɢɢ
ɨɫɬɚɬɨɤ ɪɚɜɟɧ 3.Ɉɩɟɪɚɰɢɹ ɢɧɤɪɟɦɟɧɬɚ ɩɪɟɞɫɬɚɜɥɹɟɬ ɫɨɛɨɣ ɩɪɨɰɟɞɭɪɭ ɭɜɟɥɢɱɟɧɢɹ ɱɢɫɥɚ ɧɚ ɟɞɢɧɢɰɭ. Ɉɩɟɪɚɰɢɹ ɞɟɤɪɟɦɟɧɬɚ ɭɦɟɧɶɲɚɟɬ ɢɦɟɸɳɟɟɫɹ ɱɢɫɥɨ
ɧɚ ɟɞɢɧɢɰɭ.
ȼ ɹɡɵɤɟ JavaScript ɢɫɩɨɥɶɡɭɟɬɫɹ ɫɩɟɰɢɮɢɱɟɫɤɚɹ ɮɨɪɦɚ ɨɩɟɪɚɬɨɪɚ ɩɪɢɫɜɚɢɜɚɧɢɹ. Ⱥɪɢɮɦɟɬɢɱɟɫɤɢɟ ɨɩɟɪɚɰɢɢ, ɩɪɟɞɫɬɚɜɥɟɧɧɵɟ ɜ ɫɨɤɪɚɳɟɧɧɨɣ (ɦɨɞɢɮɢɰɢɪɨɜɚɧɧɨɣ) ɮɨɪɦɟ, ɩɪɢɜɟɞɟɧɵ ɜ ɬɚɛɥɢɰɟ.
ɋɨɤɪɚɳɟɧɧɵɣ ɨɩɟɪɚɬɨɪ
ɩɪɢɫɜɚɢɜɚɧɢɹ
ɋɬɚɧɞɚɪɬɧɵɣ ɨɩɟɪɚɬɨɪ
ɩɪɢɫɜɚɢɜɚɧɢɹ
x += y x = x + y
x -= y x = x - y
x *= y x = x * y
x /= y x = x / y
x %= y x = x % y
Ɂɚɦɟɬɢɦ, ɱɬɨ ɨɛɟ ɮɨɪɦɵ ɪɚɫɫɦɨɬɪɟɧɧɨɝɨ ɨɩɟɪɚɬɨɪɚ ɩɪɢɫɜɚɢɜɚɧɢɹ ɦɨɝɭɬ ɛɵɬɶ ɢɫɩɨɥɶɡɨɜɚɧɵ ɜ ɩɪɨɝɪɚɦɦɚɯ, ɧɚɩɢɫɚɧɧɵɯ ɧɚ JavaScript.
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Ʌɨɝɢɱɟɫɤɢɟ ɨɩɟɪɚɰɢɢ ɢ ɨɩɟɪɚɰɢɢ ɫɞɜɢɝɚ
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11.6. Ʌɨɝɢɱɟɫɤɢɟ ɨɩɟɪɚɰɢɢ ɢ ɨɩɟɪɚɰɢɢ ɫɞɜɢɝɚ
Ɋɚɫɫɦɨɬɪɢɦ ɫɤɪɢɩɬ, ɤɨɬɨɪɵɣ ɜɵɩɨɥɧɹɟɬ ɥɨɝɢɱɟɫɤɢɟ ɨɩɟɪɚɰɢɢ ɢ ɨɩɟɪɚɰɢɢ ɫɞɜɢɝɚ ɧɚɞ ɞɜɭɦɹ ɞɟɫɹɬɢɱɧɵɦɢ ɩɟɪɟɦɟɧɧɵɦɢ x ɢ z ɢ ɞɜɭɦɹ ɥɨɝɢɱɟɫɤɢɦɢ (ɛɭɥɟɜɵɦɢ) ɩɟɪɟɦɟɧɧɵɦɢ q ɢ w. ȼɵɛɟɪɟɦ ɬɚɤɢɟ ɡɧɚɱɟɧɢɹ ɚɪɝɭɦɟɧɬɨɜ:
x = 7
z = 5
q = true
w = false
1. Ɋɟɡɭɥɶɬɚɬ ɥɨɝɢɱɟɫɤɨɝɨ ɭɦɧɨɠɟɧɢɹ y=x&z (ɨɩɟɪɚɰɢɹ ɂ, ɤɨɧɴɸɧɤ-
ɰɢɹ): y = 5
2. Ɋɟɡɭɥɶɬɚɬ ɥɨɝɢɱɟɫɤɨɝɨ ɫɥɨɠɟɧɢɹ y=x|z (ɨɩɟɪɚɰɢɹ ɂɅɂ, ɞɢɡɴɸɧɤ-
ɰɢɹ): y = 7
3. Ɋɟɡɭɥɶɬɚɬ ɜɵɩɨɥɧɟɧɢɹ ɨɩɟɪɚɰɢɢ ɧɟɪɚɜɧɨɡɧɚɱɧɨɫɬɢ y=x^z (ɢɫɤɥɸ-
ɱɚɸɳɟɟ ɂɅɂ) : y = 2
14
4. Ɋɟɡɭɥɶɬɚɬ ɫɞɜɢɝɚ ɜɥɟɜɨ ɧɚ ɨɞɢɧ ɪɚɡɪɹɞ ɱɢɫɥɚ x: y
5. Ɋɟɡɭɥɶɬɚɬ ɫɞɜɢɝɚ ɜɥɟɜɨ ɧɚ ɨɞɢɧ ɪɚɡɪɹɞ ɱɢɫɥɚ z: y =10
6. Ɋɟɡɭɥɶɬɚɬ ɫɞɜɢɝɚ ɜɥɟɜɨ ɧɚ ɞɜɚ ɪɚɡɪɹɞɚ ɱɢɫɥɚ x: y=28
7. Ɋɟɡɭɥɶɬɚɬ ɫɞɜɢɝɚ ɜɥɟɜɨ ɧɚ ɞɜɚ ɪɚɡɪɹɞɚ ɱɢɫɥɚ z: y =20
8. Ɋɟɡɭɥɶɬɚɬ ɫɞɜɢɝɚ ɜɩɪɚɜɨ ɧɚ ɨɞɢɧ ɪɚɡɪɹɞ ɱɢɫɥɚ x: y =3
9. Ɋɟɡɭɥɶɬɚɬ ɫɞɜɢɝɚ ɜɩɪɚɜɨ ɧɚ ɨɞɢɧ ɪɚɡɪɹɞ ɱɢɫɥɚ z: y =2
10. Ɋɟɡɭɥɶɬɚɬ ɜɵɩɨɥɧɟɧɢɹ ɨɩɟɪɚɰɢɢ ɂ: q&&w =false
11. Ɋɟɡɭɥɶɬɚɬ ɜɵɩɨɥɧɟɧɢɹ ɨɩɟɪɚɰɢɢ ɂɅɂ: q||w =true
12. Ɋɟɡɭɥɶɬɚɬ ɢɧɜɟ
ɪɬɢɪɨɜɚ
ɧɢɹ ɩɟɪɟɦɟɧɧɨɣ q: !q = false
13. Ɋɟɡɭɥɶɬɚɬ ɢɧɜɟɪɬɢɪɨɜɚɧɢɹ ɩɟɪɟɦɟɧɧɨɣ w: !w = true
Ʉɨɞ ɫɤɪɢɩɬɚ ɪɚɡɦɟɳɟɧ ɧɢɠɟ.
<script language="JavaScript">
//ȼɜɨɞ ɢɫɯɨɞɧɵɯ ɞɚɧɧɵɯ
x=7;
z=5;
q=true;
w=false;
//ȼɵɱɢɫɥɟɧɢɹ
yAnd=x&z; //ɥɨɝɢɱɟɫɤɚɹ ɨɩɟɪɚɰɢɹ ɂ
yOr=x|z; //ɥɨɝɢɱɟɫɤɚɹ ɨɩɟɪɚɰɢɹ ɂɅɂ
yXor=x^z; //ɢɫɤɥɸɱɚɸɳɟɟ ɂɅɂ
xLeft=x<<1; //ɫɞɜɢɝ ɜɥɟɜɨ ɧɚ ɨɞɢɧ ɪɚɡɪɹɞ
zLeft=z<<1; //ɫɞɜɢɝ ɜɥɟɜɨ ɧɚ ɨɞɢɧ ɪɚɡɪɹɞ
xLeft2=x<<2; //ɫɞɜɢɝ ɜɥɟɜɨ ɧɚ ɞɜɚ ɪɚɡɪɹɞɚ
zLeft2=z<<2; //ɫɞɜɢɝ ɜɥɟɜɨ ɧɚ ɞɜɚ ɪɚɡɪɹɞɚ
=
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Ʌɨɝɢɱɟɫɤɢɟ ɨɩɟɪɚɰɢɢ ɢ ɨɩɟɪɚɰɢɢ ɫɞɜɢɝɚ
xRight=x>>>1; //ɫɞɜɢɝ ɜɩɪɚɜɨ ɧɚ ɨɞɢɧ ɪɚɡɪɹɞ
zRight=z>>>1; //ɫɞɜɢɝ ɜɩɪɚɜɨ ɧɚ ɨɞɢɧ ɪɚɡɪɹɞ
u=q&&w; //ɨɩɟɪɚɰɢɹ ɂ
p=q||w; //ɨɩɟɪɚɰɢɹ ɂɅɂ
r=!q; //ɢɧɜɟɪɫɢɹ (ɨɬɪɢɰɚɧɢɟ)
t=!w; //ɢɧɜɟɪɫɢɹ (ɨɬɪɢɰɚɧɢɟ)
//ȼɵɜɨɞ ɪɟɡɭɥɶɬɚɬɨɜ ɧɚ ɷɤɪɚɧ
document.write("1. Ɋɟɡɭɥɶɬɚɬ ɥɨɝɢɱɟɫɤɨɝɨ ɭɦɧɨɠɟɧɢɹ y=x&z (ɨɩɟɪɚɰɢɹ
ɂ, ɤɨɧɴɸɧɤɰɢɹ): y = "+yAnd+"<br>");
document.write("2. Ɋɟɡɭɥɶɬɚɬ ɥɨɝɢɱɟɫɤɨɝɨ ɫɥɨɠɟɧɢɹ y=x|z (ɨɩɟɪɚɰɢɹ
ɂɅɂ, ɞɢɡɴɸɧɤɰɢɹ): y = "+yOr+"<br>");
document.write("3. Ɋɟɡɭɥɶɬɚɬ ɜɵɩɨɥɧɟɧɢɹ ɨɩɟɪɚɰɢɢ ɧɟɪɚɜɧɨɡɧɚɱɧɨɫɬɢ
y=x^z (ɢɫɤɥɸɱɚɸɳɟɟ ɂɅɂ) : y = "+yXor+"<br>");
document.write("4. Ɋɟɡɭɥɶɬɚɬ ɫɞɜɢɝɚ ɜɥɟɜɨ ɧɚ ɨɞɢɧ ɪɚɡɪɹɞ ɱɢɫɥɚ x:
y="+xLeft+"<br>");
ent.write("5. Ɋɟɡɭɥɶɬɚɬ ɫɞɜɢɝɚ ɜɥɟɜɨ ɧɚ ɨɞɢɧ ɪɚɡɪɹɞ ɱɢɫɥɚ z: y
docum
="+zLeft+"<br>");
document.write("6. Ɋɟɡɭɥɶɬɚɬ ɫɞɜɢɝɚ ɜɥɟɜɨ ɧɚ ɞɜɚ ɪɚɡɪɹɞɚ ɱɢɫɥɚ x:
y="+xLeft2+"<br>");
document.write("7. Ɋɟɡɭɥɶɬɚɬ ɫɞɜɢɝɚ ɜɥɟɜɨ ɧɚ ɞɜɚ ɪɚɡɪɹɞɚ ɱɢɫɥɚ z: y
="+zLeft2+"<br>");
document.write("8. Ɋɟɡɭɥɶɬɚɬ ɫɞɜɢɝɚ ɜɩɪɚɜɨ ɧɚ ɨɞɢɧ ɪɚɡɪɹɞ ɱɢɫɥɚ x: y
="+xRight+"<br>");
document.write("9. Ɋɟɡɭɥɶɬɚɬ ɫɞɜɢɝɚ ɜɩɪɚɜɨ ɧɚ ɨɞɢɧ ɪɚɡɪɹɞ ɱɢɫɥɚ z: y
="+zRight+"<br><br>");
document.write("10. Ɋɟɡɭɥɶɬɚɬ ɜɵɩɨɥɧɟɧɢɹ ɨɩɟɪɚɰɢɢ ɂ: q&&w
="+u+"<br>");
document.write("11. Ɋɟɡɭɥɶɬɚɬ ɜɵɩɨɥɧɟɧɢɹ ɨɩɟɪɚɰɢɢ ɂɅɂ: q||w
="+p+"<br>");
ent.write("12. Ɋɟɡɭɥɶɬɚɬ ɢɧɜɟɪɬɢɪɨɜɚɧɢɹ ɩɟɪɟɦɟɧɧɨɣ q: !q =
docum
"+r+"<br>");
document.write("13. Ɋɟɡɭɥɶɬɚɬ ɢɧɜɟɪɬɢɪɨɜɚɧɢɹ ɩɟɪɟɦɟɧɧɨɣ w: !w =
"+t+"<br>");
</script>
Ⱦɚɞɢɦ ɤɪɚɬɤɢɟ ɤɨɦɦɟɧɬɚɪɢɢ ɤ ɪɟɡɭɥɶɬɚɬɚɦ ɜɵɱɢɫɥɟɧɢɣ.
Ʌɨɝɢɱɟɫɤɨɟ ɭɦɧɨɠɟɧɢɟ ɞɜɭɯ ɞɟɫɹɬɢɱɧɵɯ ɱɢɫɟɥ 7 ɢ 5 ɞɚɥɨ ɪɟɡɭɥɶɬɚɬ 5.
Ɉɛɴɹɫɧɢɬɶ ɩɨɥɭɱɟɧɧɵɣ ɪɟɡɭɥɶɬɚɬ ɦɨɠɧɨ ɬɨɥɶɤɨ ɫ ɩɪɢɜɥɟɱɟɧɢɟɦ ɞɜɨɢɱɧɨɣ
ɫɢɫɬɟɦɵ ɫɱɢɫɥɟɧɢɹ ɢ ɡɚɤɨɧɨɜ ɛɭɥɟɜɨɣ ɚɥɝɟɛɪɵ. ɉɟɪɟɜɨɞ ɞɟɫɹɬɢɱɧɨɝɨ ɱɢɫɥɚ 7
ɜ ɞɜɨɢɱɧɭɸ ɫɢɫɬɟɦɭ ɫɱɢɫɥɟɧɢɹ ɞɚɟɬ ɪɟɡɭɥɶɬɚɬ: 7D = 111B. Ⱦɟɫɹɬɢɱɧɨɟ ɱɢɫɥɨ
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Ʌɨɝɢɱɟɫɤɢɟ ɨɩɟɪɚɰɢɢ ɢ ɨɩɟɪɚɰɢɢ ɫɞɜɢɝɚ
145
5 ɜ ɞɜɨɢɱɧɨɣ ɫɢɫɬɟɦɟ ɫɱɢɫɥɟɧɢɹ ɢɦɟɟɬ ɜɢɞ: 5D = 101B. Ɋɟɡɭɥɶɬɚɬɵ ɩɨɪɚɡɪɹɞ-
ɧɨɝɨ ɥɨɝɢɱɟɫɤɨɝɨ ɩɟɪɟɦɧɨɠɟɧɢɹ ɷɬɢɯ ɞɜɭɯ ɱɢɫɟɥ ɩɪɢɜɟɞɟɧɵ ɜ ɬɚɛɥɢɰɟ.
ȼɟɥɢɱɢɧɵ
Ⱦɜɨɢɱɧɵɟ ɪɚɡɪɹɞɵ
3 2 1
ɉɟɪɟɦɟɧɧɚɹ x=7D 1 1 1
ɉɟɪɟɦɟɧɧɚɹ z=5D 1 0 1
Ɋɟɡɭɥɶɬɚɬ ɭɦɧɨɠɟɧɢɹ (x & z) 1 0 1
ɉɨɫɥɟɞɧɹɹ ɫɬɪɨɤɚ ɝɨɜɨɪɢɬ ɨ ɬɨɦ, ɱɬɨ ɜ ɪɟɡɭɥɶɬɚɬɟ ɥɨɝɢɱɟɫɤɨɝɨ ɭɦɧɨɠɟɧɢɹ ɞɜɭɯ ɞɟɫɹɬɢɱɧɵɯ ɱɢɫɟɥ 7 ɢ 5 ɩɨɥɭɱɟɧɨ ɞɜɨɢɱɧɨɟ ɱɢɫɥɨ 101ȼ = 5D.
Ⱥɧɚɥɨɝɢɱɧɨ ɦɨɠɧɨ ɪɚɫɫɦɨɬɪɟɬɶ ɪɟɡɭɥɶɬɚɬɵ ɥɨɝɢɱɟɫɤɨɝɨ ɫɥɨɠɟɧɢɹ
(ɨɩɟɪɚɰɢɹ ɂɅɂ).
ȼɟɥɢɱɢɧɵ
Ⱦɜɨɢɱɧɵɟ ɪɚɡɪɹɞɵ
3 2 1
ɉɟɪɟɦɟɧɧɚɹ x=7D 1 1 1
ɉɟɪɟɦɟɧɧɚɹ z=5D 1 0 1
Ɋɟɡɭɥɶɬɚɬ ɫɥɨɠɟɧɢɹ (x | z) 1 1 1
ɉɨɫɥɟɞɧɹɹ ɫɬɪɨɤɚ ɝɨɜɨɪɢɬ ɨ ɬɨɦ, ɱɬɨ ɜ ɪɟɡɭɥɶɬɚɬɟ ɥɨɝɢɱɟɫɤɨɝɨ ɫɥɨɠɟɧɢɹ ɞɜɭɯ ɞɟɫɹɬɢɱɧɵɯ ɱɢɫɟɥ 7 ɢ 5 ɩɨɥɭɱɟɧɨ ɞɜɨɢɱɧɨɟ ɱɢɫɥɨ 111ȼ = 7D.
Ɋɚɫɫɦɨɬɪɢɦ ɪɟɡɭɥɶɬɚɬɵ ɜɵɩɨɥɧɟɧɢɹ ɨɩɟɪɚɰɢɢ ɧɟɪɚɜɧɨɡɧɚɱɧɨɫɬɢ (ɢɫɤɥɸɱɚɸɳɟɟ ɂɅɂ).
ȼɟɥɢɱɢɧɵ
Ⱦɜɨɢɱɧɵɟ ɪɚɡɪɹɞɵ
3 2 1
ɉɟɪɟɦɟɧɧɚɹ x=7D 1 1 1
ɉɟɪɟɦɟɧɧɚɹ z=5D 1 0 1
Ɋɟɡɭɥɶɬɚɬ (x ^ z) 0 1 0
ɉɨɫɥɟɞɧɹɹ ɫɬɪɨɤɚ ɝɨɜɨɪɢɬ ɨ ɬɨɦ, ɱɬɨ ɜ ɪɟɡɭɥɶɬɚɬɟ ɜɵɩɨɥɧɟɧɢɹ ɩɨɪɚɡɪɹɞɧɨɣ ɨɩɟɪɚɰɢɢ ɢɫɤɥɸɱɚɸɳɟɟ ɂɅɂ ɧɚɞ ɞɟɫɹɬɢɱɧɵɦɢ ɱɢɫɥɚɦɢ 7 ɢ 5 ɩɨɥɭɱɟɧɨ ɞɜɨɢɱɧɨɟ ɱɢɫɥɨ 010ȼ = 2D.
Ⱦɥɹ ɩɨɧɢɦɚɧɢɹ ɩɨɥɭɱɟɧɧɨɝɨ ɪɟɡɭɥɶɬɚɬɚ ɫɞɜɢɝɚ ɱɢɫɥɚ ɜɥɟɜɨ ɧɟɨɛɯɨɞɢɦɨ ɜɫɩɨɦɧɢɬɶ, ɱɬɨ ɫɬɚɪɲɢɟ ɪɚɡɪɹɞɵ ɞɜɨɢɱɧɵɯ ɱɢɫɟɥ ɪɚɫɩɨɥɚɝɚɸɬɫɹ ɫɥɟɜɚ, ɚ
ɦɥɚɞɲɢɟ - ɫɩɪɚɜɚ. ɉɨɫɥɟ ɫɞɜɢɝɚ ɱɢɫɥɚ x=7D ɧɚ ɨɞɢɧ ɪɚɡɪɹɞ ɜɥɟɜɨ ɛɭɞɟɬ ɩɨɥɭɱɟɧɨ ɞɜɨɢɱɧɨɟ ɱɢɫɥɨ 1110B, ɤɨɬɨɪɨɟ ɫɨɨɬɜɟɬɫɬɜɭɟɬ ɞɟɫɹɬɢɱɧɨɦɭ ɱɢɫɥɭ
14D. Ɂɚɦɟɬɢɦ, ɱɬɨ ɨɩɟɪɚɰɢɹ ɫɞɜɢɝɚ ɞɜɨɢɱɧɨɝɨ ɱɢɫɥɚ ɧɚ ɨɞɢɧ ɪɚɡɪɹɞ ɜɥɟɜɨ
146
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Ʌɨɝɢɱɟɫɤɢɟ ɨɩɟɪɚɰɢɢ ɢ ɨɩɟɪɚɰɢɢ ɫɞɜɢɝɚ
ɷɤɜɢɜɚɥɟɧɬɧɚ ɭɦɧɨɠɟɧɢɸ ɱɢɫɥɚ ɧɚ 2. ɋɞɜɢɝ ɜɥɟɜɨ ɧɚ ɞɜɚ ɪɚɡɪɹɞɚ ɷɤɜɢɜɚɥɟɧɬɟɧ ɭɦɧɨɠɟɧɢɸ ɱɢɫɥɚ ɧɚ 4 ɢ ɬ.ɞ.
Ɂɚɦɟɬɢɦ, ɱɬɨ ɬɟɯɧɢɱɟɫɤɢ ɨɩɟɪɚɰɢɹ ɫɞɜɢɝɚ ɜ ɗȼɆ ɜɵɩɨɥɧɹɟɬɫɹ ɫ ɩɨɦɨɳɶɸ ɩɨɫɥɟɞɨɜɚɬɟɥɶɧɵɯ ɪɟɝɢɫɬɪɨɜ. ɉɪɢ ɛɨɥɶɲɢɯ ɡɧɚɱɟɧɢɹɯ ɜɡɹɬɵɯ ɱɢɫɟɥ
(ɨɩɟɪɚɧɞɨɜ) ɬɨɱɧɨɫɬɶ ɜɵɱɢɫɥɟɧɢɣ ɛɭɞɟɬ ɡɚɜɢɫɟɬɶ ɨɬ ɪɚɡɪɹɞɧɨɫɬɢ ɢɫɩɨɥɶɡɭɟɦɵɯ ɪɟɝɢɫɬɪɨɜ ɫɞɜɢɝɚ (ɱɢɫɥɨɦ ɭɫɬɚɧɨɜɥɟɧɧɵɯ ɜ ɧɢɯ ɬɪɢɝɝɟɪɨɜ). Ⱦɥɹ ɹɡɵɤɚ
JavaScript ɞɨɩɭɫɬɢɦɚɹ ɪɚɡɪɹɞɧɨɫɬɶ ɞɜɨɢɱɧɵɯ ɨɩɟɪɚɧɞɨɜ ɨɝɪɚɧɢɱɟɧɚ ɬɪɢɞɰɚɬɶɸ ɞɜɭɦɹ ɛɢɬɚɦɢ. ɉɨ ɷɬɨɣ ɩɪ
ɢɱɢɧɟ ɨɩɟɪɚɰɢɢ ɫ ɱɢɫɥɚɦɢ ɛɨɥɟɟ
231=2147483648 ɛɭɞɭɬ ɜɵɩɨɥɧɹɬɶɫɹ ɧɟɜɟɪɧɨ.
Ɉɩɟɪɚɰɢɹ ɫɞɜɢɝɚ ɜɩɪɚɜɨ ɩɪɢɜɨɞɢɬ ɤ ɭɦɟɧɶɲɟɧɢɸ ɢɫɯ
ɨɞɧɨɝɨ ɨɩɟɪɚɧɞɚ.
ɉɪɢ ɷɬɨɦ, ɟɫɥɢ ɦɥɚɞɲɢɣ ɛɢɬ ɛɵɥ ɪɚɜɟɧ 0, ɬɨ ɫɞɜɢɝ ɜɩɪɚɜɨ ɧɚ ɨɞɢɧ ɪɚɡɪɹɞ
ɛɭɞɟɬ ɷɤɜɢɜɚɥɟɧɬɟɧ ɞɟɥɟɧɢɸ ɱɢɫɥɚ ɧɚ 2. ɇɚɩɪɢɦɟɪ, ɫɞɜɢɝ ɱɢɫɥɚ 6D=110B
ɞɚɫɬ ɪɟɡɭɥɶɬɚɬ 11B
(ɷɬɨ ɞɜɨɢɱɧɨɟ ɱɢɫɥɨ ɫɨɨɬɜɟɬɫɬɜɭɟɬ ɞɟɫɹɬɢɱɧɨɦɭ ɱɢɫɥɭ
3D). ȿɫɥɢ ɢɫɯɨɞɧɵɣ ɨɩɟɪɚɧɞ ɧɟɱɟɬɧɵɣ (ɞɜɨɢɱɧɨɟ ɱɢɫɥɨ ɡɚɤɚɧɱɢɜɚɟɬɫɹ ɟɞɢ-
ɧɢɰɟɣ), ɬɨ ɫɞɜɢɝ ɜɩɪɚɜɨ ɧɟ ɛɭɞɟɬ ɫɨɨɬɜɟɬɫɬɜɨɜɚɬɶ ɨɩɟɪɚɰɢɢ ɞɟɥɟɧɢɹ ɧɚ ɞɜɚ.
ɇɚɩɪɢɦɟɪ, ɩɨɫɥɟ ɫɞɜɢɝɚ ɱɢɫɥɚ 5D=101B ɛɭɞɟɬ ɩɨɥɭɱɟɧ ɪɟɡɭɥɶɬɚɬ 10B=2D.
Ɉɩɟɪɚɰɢɢ 1...9 ɩɪɨɜɨɞɢɥɢɫɶ ɧɚɞ ɦɧɨɝɨɪɚɡɪɹɞɧɵɦɢ ɞɜɨɢɱɧɵɦɢ ɱɢɫɥɚɦɢ. Ɂɧɚɱɢɬɟɥɶɧɨ ɱɚɳɟ ɜ ɩɪɚɤɬɢɤɟ Web-ɞɢɡɚɣɧɚ ɥɨɝɢɱɟɫɤɢɟ ɨɩɟɪɚɰɢɢ ɢɫɩɨ
ɡɭɸɬɫɹ ɩɪ
ɢ ɮɨɪɦɢɪɨɜɚɧɢɢ ɭɫɥɨɜɢɣ ɜɟɬɜɥɟɧɢɹ. ȼ ɷɬɢɯ ɫɥɭɱɚɹɯ ɥɨɝɢɱɟɫɤɢɟ
ɥɶ-
ɩɟɪɟɦɟɧɧɵɟ ɩɪɢɧɢɦɚɸɬ ɞɜɚ ɡɧɚɱɟɧɢɹ: true (ɂɫɬɢɧɚ) ɢ false (Ʌɨɠɶ). Ⱦɥɹ ɮɨɪɦɢɪɨɜɚɧɢɹ ɭɫɥɨɜɢɣ ɜɟɬɜɥɟɧɢɹ ɜ ɪɚɫɩɨɪɹɠɟɧɢɢ ɞɢɡɚɣɧɟɪɚ ɢɦɟɟɬɫɹ ɬɪɢ ɨɩɟɪɚɰɢɢ:
- ɢɧɜɟɪɫɢɹ (ɨɛɨɡɧɚɱɚɟɬɫɹ ɫɢɦɜɨɥɨɦ !);
- ɨɩɟɪɚɰɢɹ ɂ (ɨɛɨɡɧɚɱɚɟɬɫɹ ɫɢɦɜɨɥɚɦɢ &&);
- ɨɩɟɪɚɰɢɹ ɂɅɂ (ɨɛɨɡɧɚɱɚɟɬɫɹ ɫɢɦɜɨɥɚɦɢ ||).
Ɋɟɡɭɥɶɬɚɬɵ 10...13 ɞɟɦɨɧɫɬɪɢɪɭɸɬ ɢɫɩɨɥɶɡɨɜɚɧɢɟ ɷɬɢɯ ɨɩɟɪɚɰɢɣ.
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Ɉɩɟɪɚɰɢɢ ɫɨ ɫɬɪɨɤɨɜɵɦɢ ɩɟɪɟɦɟɧɧɵɦɢ
147
11.7. Ɉɩɟɪɚɰɢɢ ɫɨ ɫɬɪɨɤɨɜɵɦɢ ɩɟɪɟɦɟɧɧɵɦɢ
ȼ ɫɨɫɬɚɜɟ ɹɡɵɤɚ JavaScript ɟɫɬɶ ɫɪɟɞɫɬɜɚ ɞɥɹ ɪɚɛɨɬɵ ɫɨ ɫɬɪɨɤɨɜɵɦɢ
(ɫɢɦɜɨɥɶɧɵɦɢ) ɩɟɪɟɦɟɧɧɵɦɢ.
ɑɚɳɟ ɞɪɭɝɢɯ ɢɫɩɨɥɶɡɭɟɬɫɹ ɨɩɟɪɚɰɢɹ ɤɨɧɤɚɬɟɧɚɰɢɢ (ɨɛɴɟɞɢɧɟɧɢɹ,
ɫɭɦɦɢɪɨɜɚɧɢɹ) ɫɬɪɨɤɨɜɵɯ ɩɟɪɟɦɟɧɧɵɯ ɢ ɤɨɧɫɬɚɧɬ. ɇɚɩɪɢɦɟɪ, ɫɬɪɨɤɨɜɚɹ
ɨɩɟɪɚɰɢɹ "7"+"3" ɞɚɫɬ ɪɟɡɭɥɶɬɚɬ "73". ȼ ɫɨɫɬɚɜɟ ɹɡɵɤɚ JavaScript ɟɫɬɶ ɦɟɬɨɞɵ, ɩɪɟɞɧɚɡɧɚɱɟɧɧɵɟ ɞɥɹ ɩɪɟɨɛɪɚɡɨɜɚɧɢɹ ɫɬɪɨɤɨɜɵɯ ɩɟɪɟɦɟɧɧɵɯ ɜ ɱɢɫɥɨɜɵɟ. ɇɟɨɛɯɨɞɢɦɨɫɬɶ ɜ ɩɨɞɨɛɧɵɯ ɦɟɬɨɞɚɯ ɨɫɨɛɟɧɧɨ ɨɛɨɫɬɪɹɟɬɫɹ ɜ ɫɥɭɱɚɹɯ
ɜɜɨɞɚ ɢɧɮɨɪɦɚɰɢɢ ɫ ɩɨɦɨɳɶɸ ɪ
ɚɡɥɢɱɧɵɯ ɮɨɪɦ (ɬɟɤɫɬɨɜɨɟ ɩɨ
ɨɛɥɚɫɬɶ). Ɇɟɬɨɞ parseInt(x,s) ɩɪɟɨɛɪɚɡɭɟɬ ɫɬɪɨɤɨɜɭɸ ɩɟɪɟɦɟɧɧɭɸ ɯ ɜ ɰɟɥɨɱɢɫɥɟɧɧɭɸ ɩɟɪɟɦɟɧɧɭɸ, ɩɪɟɞɫɬɚɜɥɟɧɧɭɸ ɜ ɞɟɫɹɬɢɱɧɨɣ ɫɢɫɬɟɦɟ ɫɱɢɫɥɟɧɢɹ.
ɉɟɪɟɦɟɧɧɚɹ s ɭɱɢɬɵɜɚɟɬ ɜ ɤɚɤɨɣ ɫɢɫɬɟɦɟ ɫɱɢɫɥɟɧɢɹ (ɞɜɨɢɱɧɨɣ ɢɥɢ ɲɟɫɬɧɚɞɰɚɬɟɪɢɱɧɨɣ) ɜɵɪɚɠɟɧɨ ɱɢɫɥɨ ɯ.
Ɇɟɬɨɞ parseFloat(x) ɩɪɟɨɛɪɚɡɭɟɬ ɫɬɪɨɤɨɜɭɸ ɩɟɪɟɦɟɧɧɭɸ ɯ ɜ ɜɟɳɟɫɬ-
ɜɟɧɧɭɸ ɱɢɫɥɨɜɭɸ ɩɟɪɟɦɟɧɧɭɸ (ɫ ɩɥɚɜɚɸɳɟɣ ɡɚɩɹɬɨɣ).
Ɇɟɬɨɞ Str.charAt(n) ɩɨɡɜɨɥɹɟɬ ɜɵɞɟɥɢɬɶ ɢɡ ɫɬɪɨɤɨɜɨɣ ɩɟɪɟɦɟɧɧɨɣ ɫ
ɢɦɟɧɟɦ Str ɫɢɦɜɨɥ, ɪɚɫɩɨɥɨɠɟɧɧɵɣ ɜ ɩɨ
ɡɢɰɢɢ n.
Ɉɬɫɱɟɬ ɩɨɪɹɞɤɨɜɵɯ ɧɨɦɟɪɨɜ
ɫɢɦɜɨɥɨɜ ɧɚɱɢɧɚɟɬɫɹ ɫ ɧɭɥɹ.
Ɇɟɬɨɞ Str.substring(n,m) ɞɚɟɬ ɜɨɡɦɨɠɧɨɫɬɶ ɜɵɞɟɥɢɬɶ ɢɡ ɫɬɪɨɤɢ ɫ ɢɦɟ-
ɧɟɦ Str ɩɨɞɫɬɪɨɤɭ, ɤɨɬɨɪɚɹ ɪɚɫɩɨɥɚɝɚɟɬɫɹ ɨɬ ɩɨɡɢɰɢɢ n ɞɨ ɩɨɡɢɰɢɢ m-1.
ɋɜɨɣɫɬɜɨ Str.length ɨɩɟɪɟɞɟɥɹɟɬ, ɫɤɨɥɶɤɨ ɫɢɦɜɨɥɨɜ ɫɨɞɟɪɠɢɬɫɹ ɜ ɩɟ-
ɪɟɦɟɧɧɨɣ Str.
ɋ ɩɨɦɨɳɶɸ ɦɟɬɨɞɚ Str.toLowerCase() ɦɨɠɧɨ ɩɪɟɨɛɪɚɡɨɜɚɬɶ ɫɢɦɜɨɥɵ
ɩɟɪɟɦɟɧɧɨɣ Str ɜ ɫɬɪɨɱɧɵɟ ɛɭɤɜɵ (ɫɢɦɜɨɥɵ ɧɢɠɧɟɝɨ ɪɟɝɢɫɬɪɚ). Ɇɟɬɨɞ
Str.toUpperCase() ɞɟɣɫɬɜɭɟɬ "ɜ ɨɛɪɚɬɧɨɦ" ɧɚɩɪɚɜɥɟɧɢɢ: ɩɪɟɨɛɪɚɡɭɟɬ ɫɢɦɜɨɥɵ
ɩɟɪɟɦɟɧɧɨɣ ɫ ɢɦɟɧɟɦ Str ɜ ɡɚɝɥɚɜɧɵɟ ɛɭɤɜɵ (ɫɢɦɜɨɥɵ ɜɟɪɯɧɟɝɨ ɪɟɝɢɫɬɪɚ).
Ɇɟɬɨɞɵ Str.indexOf(SubStr,n) ɢ Str.lastIndexOf(SubStr,n) ɩɨɡɜɨɥɹɸɬ ɨɩɪɟɞɟɥɢɬɶ ɧɨɦɟɪ ɩɨ
ɜɯɨɞɢɬ ɜ ɫɬɪɨɤɨɜɭɸ ɩɟɪɟɦɟɧɧɭɸ Str.
ɡɢɰɢɢ ɩɨɞɫɬɪɨɤɢ SubStr, ɧɚɱɢɧɚɹ ɫ ɤɨɬɨɪɨɣ ɩɨɞɫɬɪɨɤɚ
ɉɨɢɫɤ ɜɯɨɠɞɟɧɢɹ ɩɨɞɫɬɪɨɤɢ ɧɚɱɢɧɚɟɬɫɹ
ɫ ɩɨɡɢɰɢɢ n. ȿɫɥɢ ɢɫɤɨɦɚɹ ɩɨɞɫɬɪɨɤɚ ɨɬɫɭɬɫɬɜɭɟɬ ɜ ɫɨɫɬɚɜɟ ɫɬɪɨɤɢ Str, ɬɨ
ɦɟɬɨɞ ɜɨɡɜɪɚɳɚɟɬ ɪɟɡɭɥɶɬɚɬ -1. Ɋɚɡɥɢɱɢɟ ɪɚɫɫɦɚɬɪɢɜɚɟɦɵɯ ɦɟɬɨɞɨɜ ɫɨɫɬɨɢɬ
ɜ ɬɨɦ, ɱɬɨ ɦɟɬɨɞ indexOf(SubStr,n) ɜɟɞɟɬ ɩɨɢɫɤ ɩɨɞɫɬɪɨɤɢ SubStr ɨɬ ɧɚɱɚɥɚ
ɫɬɪɨɤɢ Str ɤ ɟɺ ɤɨɧɰɭ (ɫɥɟɜɚ - ɧɚɩɪɚɜɨ), ɚ ɦɟɬɨɞ Str.lastIndexOf(SubStr,n) ɧɚɨɛɨɪɨɬ, ɨɬ ɤɨɧɰɚ ɫɬɪɨɤɢ ɤ ɟɺ ɧɚɱɚɥɭ (ɫɩɪɚɜɚ - ɧɚɥɟɜɨ). ȿɫɥɢ ɡɧɚɱɟɧɢɟ ɩɟɪɟɦɟɧɧɨɣ n ɧɟ ɭɤɚɡɚɧɨ, ɬɨ ɩɨɢɫɤ ɩɨɞɫɬɪɨɤɢ SubStr ɜɟɞɟɬɫɹ ɞɥɹ ɦɟɬɨɞɚ in
dexOf(SubStr) ɫ ɧɚɱɚɥɚ ɫɬɪɨɤɢ Str,
ɚ ɞɥɹ ɦɟɬɨɞɚ lastIndexOf(SubStr) - ɫ ɤɨɧɰɚ
ɫɬɪɨɤɢ Str.
ɇɢɠɟ ɩɪɢɜɟɞɟɧɵ ɩɪɢɦɟɪɵ ɢɫɩɨɥɶɡɨɜɚɧɢɹ ɫɬɪɨɤɨɜɵɯ ɦɟɬɨɞɨɜ ɢ
ɫɜɨɣɫɬɜ.
Ʉɨɧɤɚɬɟɧɚɰɢɹ ɞɜɭɯ ɫɬɪɨɤ “ɉɚɪɨ” ɢ “ɯɨɞ” ɞɚɫɬ: “ɉɚɪɨɯɨɞ”
Ʉɨɧɤɚɬɟɧɚɰɢɹ ɞɜɭɯ ɫɬɪɨɤ 23 ɢ 77 ɞɚɫɬ: “23 ” + “77 ” = 2377
ɥɟ, ɬɟɤɫɬɨɜɚɹ
-
148
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Ɉɩɟɪɚɰɢɢ ɫɨ ɫɬɪɨɤɨɜɵɦɢ ɩɟɪɟɦɟɧɧɵɦɢ
ɋɭɦɦɢɪɨɜɚɧɢɟ ɞɜɭɯ ɱɢɫɟɥ 23 ɢ 77 ɞɚɫɬ: = 100
ɐɟɥɨɱɢɫɥɟɧɧɨɟ ɩɪɟɨɛɪɚɡɨɜɚɧɢɟ ɫɬɪɨɤɢ “3.14159” ɞɚɫɬ: = 3
ȼɟɳɟɫɬɜɟɧɧɨɟ ɩɪɟɨɛɪɚɡɨɜɚɧɢɟ ɫɬɪɨɤɢ “3.14159” ɞɚɫɬ: = 3.14159
ɉɟɪɜɚɹ ɛɭɤɜɚ ɫɥɨɜɚ “ɋɬɪɨɤɚ” - ɋ.
Ɍɪɟɬɶɹ ɛɭɤɜɚ ɫɥɨɜɚ “ɋɬɪɨɤɚ” - ɪ.
ȼ ɫɥɨɜɟ “ɋɬɪɨɤɚ” ɜ ɩɨɡɢɰɢɹɯ 3...5 ɪɚɫɩɨɥɨɠɟɧɚ ɩɨɞɫɬɪɨɤɚ - ɪɨɤ.
ɋɥɨɜɨ “ɋɬɪɨɤɚ” ɫɨɞɟɪɠɢɬ - 6 ɫɢɦɜɨɥɨɜ.
ɋɢɦɜɨɥɵ ɫɥɨɜɚ “ɋɬɪɨɤɚ” ɩɪɟɨɛɪɚɡɨɜɚɧɵ ɤ ɧɢɠɧɟɦɭ ɪɟɝɢɫɬɪɭ - ɫɬɪɨɤɚ.
ɋɢɦɜɨɥɵ ɫɥɨɜɚ “ɋɬɪɨɤɚ” ɩɪɟɨɛɪɚɡɨɜɚɧɵ ɤ ɜɟɪɯɧɟɦɭ ɪɟɝɢɫɬɪɭ -
ɋɌɊɈɄȺ.
ɉɨɞɫɬɪɨɤɚ “ɪɨɤ” ɜɯɨɞɢɬ ɜ ɫɥɨɜɨ “ɋɬɪɨɤɚ”, ɧɚɱɢɧɚɹ ɫ ɩɨ
ɨɬ ɧɚɱɚɥɚ ɫɬɪɨɤɢ.
ɢɫɤ -
ɡɢɰɢɢ - 2. ɉɨ-
ɉɨɞɫɬɪɨɤɚ “ɪɨɤ” ɜɯɨɞɢɬ ɜ ɫɥɨɜɨ “ɋɬɪɨɤɚ”, ɧɚɱɢɧɚɹ ɫ ɩɨɡɢɰɢɢ - 2. ɉɨ-
ɢɫɤ - ɨɬ ɤɨɧɰɚ ɫɬɪɨɤɢ.
Ʉɨɞ ɞɚɧɧɨɝɨ ɫɤɪɢɩɬɚ ɩɪɢɜɟɞɟɧ ɧɢɠɟ.
<script language="JavaScript">
var str1="ɋɬɪɨɤɚ";
var SubStr="ɪɨɤ";
var str2="ɉɚɪɨ";
var str3="ɯɨɞ";
var str4="23";
var str5="77";
var str6="3.14159";
document.write("Ʉɨɧɤɚɬɟɧɚɰɢɹ ɞɜɭɯ ɫɬɪɨɤ “ɉɚɪɨ” ɢ
“ɯɨɞ” ɞɚɫɬ: " + "“" + str2 + str3 + "” " + "<br>");
document.write("Ʉɨɧɤɚɬɟɧɚɰɢɹ ɞɜɭɯ ɫɬɪɨɤ 23 ɢ 77 ɞɚɫɬ: “23
” + “77 ” = " + str4 + str5 + "<br>");
ent.write("ɋɭɦɦɢɪɨɜɚɧɢɟ ɞɜɭɯ ɱɢɫɟɥ 23
docum
ɢ 77 ɞɚɫɬ: = " + (par-
seInt(str4) + parseInt(str5)) + "<br>");
document.write("ɐɟɥɨɱɢɫɥɟɧɧɨɟ ɩɪɟɨɛɪɚɡɨɜɚɧɢɟ ɫɬɪɨɤɢ
“3.14159” ɞɚɫɬ: = " + parseInt(str6) + "<br>");
document.write("ȼɟɳɟɫɬɜɟɧɧɨɟ ɩɪɟɨɛɪɚɡɨɜɚɧɢɟ ɫɬɪɨɤɢ
“3.14159” ɞɚɫɬ: = " + parseFloat(str6) + "<br>");
document.write("ɉɟɪɜɚɹ ɛɭɤɜɚ ɫɥɨɜɚ “ɋɬɪɨɤɚ” - " +
str1.charAt(0) + "." + "<br>");
document.write("Ɍɪɟɬɶɹ ɛɭɤɜɚ ɫɥɨɜɚ “ɋɬɪɨɤɚ” - " +
str1.charAt(2) + "." + "<br>");
document.write("ȼ ɫɥɨɜɟ “ɋɬɪɨɤɚ” ɜ ɩɨɡɢɰɢɹɯ 3...5 ɪɚɫɩɨ-
ɥɨɠɟɧɚ ɩɨɞɫɬɪɨɤɚ - " + str1.substring(2,5) + "." + "<br>");
__________________________________________________________________________________
Ɉɩɟɪɚɰɢɢ ɫɨ ɫɬɪɨɤɨɜɵɦɢ ɩɟɪɟɦɟɧɧɵɦɢ
149
document.write("ɋɥɨɜɨ “ɋɬɪɨɤɚ” ɫɨɞɟɪɠɢɬ - " +
str1.length + " ɫɢɦɜɨɥɨɜ" + "." + "<br>");
document.write("ɋɢɦɜɨɥɵ ɫɥɨɜɚ “ɋɬɪɨɤɚ” ɩɪɟɨɛɪɚɡɨɜɚɧɵ
ɤ ɧɢɠɧɟɦɭ ɪɟɝɢɫɬɪɭ - " + str1.toLowerCase() + "." + "<br>");
document.write("ɋɢɦɜɨɥɵ ɫɥɨɜɚ “ɋɬɪɨɤɚ” ɩɪɟɨɛɪɚɡɨɜɚɧɵ
ɤ ɜɟɪɯɧɟɦɭ ɪɟɝɢɫɬɪɭ - " + str1.toUpperCase() + "." + "<br>");
document.write("ɉɨɞɫɬɪɨɤɚ “ɪɨɤ” ɜɯɨɞɢɬ ɜ ɫɥɨɜɨ
“ɋɬɪɨɤɚ”, ɧɚɱɢɧɚɹ ɫ ɩɨɡɢɰɢɢ - " + str1.indexOf(SubStr) + "." + "
ɉɨɢɫɤ - ɨɬ ɧɚɱɚɥɚ ɫɬɪɨɤɢ." + "<br>");
document.write("ɉɨɞɫɬɪɨɤɚ “ɪɨɤ” ɜɯɨɞɢɬ ɜ ɫɥɨɜɨ
“ɋɬɪɨɤɚ”, ɧɚɱɢɧɚɹ ɫ ɩɨɡɢɰɢɢ - " + str1.lastIndexOf(SubStr) + "."
+ " ɉɨɢɫɤ - ɨɬ ɤɨɧɰɚ ɫɬɪɨɤɢ." + "<br>");
</script>
Ⱦɚɞɢɦ ɤɨɦɦɟɧɬɚɪɢɢ ɤ ɪɟɡɭɥɶɬɚɬɚɦ ɪɚɛɨɬɵ ɫɤɪɢɩɬɚ.ɋɨɝɥɚɫɧɨ ɪɚɫɱɟɬɚɦ
ɩɨɞɫɬɪɨɤɚ "ɪɨɤ" ɜɯɨɞɢɬ ɜ ɫɬɪɨɤɭ "ɋɬɪɨɤɚ", ɧɚɱɢɧɚɹ ɫ ɩɨ
ɡɢɰɢɢ 2. ɇɭɠɧɨ ɩɨ
ɦɧɢɬɶ, ɱɬɨ ɫɱɟɬ ɧɨɦɟɪɨɜ ɩɨɡɢɰɢɣ ɜɟɞɟɬɫɹ, ɧɚɱɢɧɚɹ ɫ ɧɭɥɹ. Ɋɟɡɭɥɶɬɚɬɵ ɩɨɢɫɤɚ
ɩɨɡɢɰɢɢ ɪɚɫɩɨɥɨɠɟɧɢɹ ɩɨɞɫɬɪɨɤɢ "ɪɨɤ" ɫ ɩɨɦɨɳɶɸ ɦɟɬɨɞɨɜ
str1.lastIndexOf(SubStr) ɢ str1.indexOf(SubStr) ɨɤɚɡɚɥɢɫɶ ɨɞɢɧɚɤɨɜɵɦɢ. ɗɬɨ
ɟɫɬɟɫɬɜɟɧɧɨ: ɧɨɦɟɪ ɩɨɡɢɰɢɢ ɜɯɨɠɞɟɧɢɹ ɩɨɞɫɬɪɨɤɢ ɧɟ ɢɡɦɟɧɢɥɫɹ ɢɡ-ɡɚ ɫɦɟɧɵ
ɧɚɩɪɚɜɥɟɧɢɹ ɩɨɢɫɤɚ.
150
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ɉɟɪɟɜɨɞ ɱɢɫɟɥ ɢɡ ɨɞɧɨɣ ɫɢɫɬɟɦɵ ɫɱɢɫɥɟɧɢɹ ɜ ɞɪɭɝɭɸ
11.7.1. ɉɟɪɟɜɨɞ ɱɢɫɟɥ ɢɡ ɨɞɧɨɣ ɫɢɫɬɟɦɵ ɫɱɢɫɥɟɧɢɹ ɜ ɞɪɭɝɭɸ
ɉɟɪɟɜɨɞ ɞɜɨɢɱɧɵɯ ɢ ɲɟɫɬɧɚɞɰɚɬɟɪɢɱɧɵɯ ɱɢɫɟɥ ɜ ɞɟɫɹɬɢɱɧɭɸ ɫɢɫɬɟɦɭ
ɫɱɢɫɥɟɧɢɹ (ɋɋ) ɦɨɠɧɨ ɨɫɭɳɟɫɬɜɢɬɶ ɫ ɩɨɦɨɳɶɸ ɮɭɧɤɰɢɢ ɩɪɟɨɛɪɚɡɨɜɚɧɢɹ
ɫɬɪɨɤɨɜɵɯ ɩɟɪɟɦɟɧɧɵɯ ɜ ɰɟɥɨɱɢɫɥɟɧɧɵɟ ɩɟɪɟɦɟɧɧɵɟ - ɦɟɬɨɞ parseInt(x, s).
Ɂɞɟɫɶ ɩɪɢɧɹɬɵ ɬɚɤɢɟ ɨɛɨɡɧɚɱɟɧɢɹ: x - ɩɪɟɨɛɪɚɡɭɟɦɚɹ ɫɬɪɨɤɨɜɚɹ (ɢɥɢ ɱɢɫɥɨɜɚɹ) ɩɟɪɟɦɟɧɧɚɹ; s - ɫɢɫɬɟɦɚ ɫɱɢɫɥɟɧɢɹ, ɜ ɤɨɬɨɪɨɣ ɩɪɟɞɫɬɚɜɥɟɧɚ ɩɟɪɟɦɟɧɧɚɹ
x. Ⱦɥɹ ɞɜɨɢɱɧɨɣ ɋɋ s = 2, ɚ ɞɥɹ ɲɟɫɬɧɚɞɰɚɬɟɪɢɱɧɨɣ ɋɋ s = 16.
Ɋɚɫɫɦɨɬɪɢɦ ɫɤɪɢɩɬ, ɩɪɟɞɧɚɡɧɚɱɟɧɧɵɣ ɞɥɹ ɩɟɪɟɜɨɞɚ ɱɢɫɟɥ ɢɡ ɞɜɨɢɱɧɨɣ
ɫɢɫɬɟɦɵ ɫɱɢɫɥɟɧɢɹ ɜ ɞɟɫɹɬɢɱɧɭɸ ɋɋ.
ȿɫɥɢ ɜ ɬɟɤɫɬɨɜɨɟ ɩɨɥɟ ɜɜɟɫɬɢ ɱɢɫɥɨ 101, ɬɨ ɩɨɫɥɟ ɳɟɥɱɤɚ ɩɨ ɤɧɨɩɤɟ
«ɉɟɪɟɜɟɫɬɢ ɜ ɞɟɫɹɬɢɱɧɭɸ ɋɋ» ɩɨɹɜɢɬɫɹ ɫɨɨɛɳɟɧɢɟ: "Ⱦɟɫɹɬɢɱɧɵɣ ɷɤɜɢɜɚɥɟɧɬ ɷɬɨɝɨ ɞɜɨɢɱɧɨɝɨ ɱɢɫɥɚ 5 ".
Ʉɨɞ ɫɤɪɢɩɬɚ ɩɪɢɜɟɞɟɧ ɧɢɠɟ.
<script language="JavaScript">
function func_str() {
var a1=document.form_str.inp_str.value;
var a2=parseInt(a1, 2);
alert ("Ⱦɟɫɹɬɢɱɧɵɣ ɷɤɜɢɜɚɥɟɧɬ ɷɬɨɝɨ ɞɜɨɢɱɧɨɝɨ ɱɢɫɥɚ " + a2);
}
</script>
<form name="form_str" >
<input type="Text" name="inp_str" value="" size="23"><br><br>
<input type="Button" value="ɉɟɪɟɜɟɫɬɢ ɜ ɞɟɫɹɬɢɱɧɭɸ ɋɋ" onclick="javacsript:func_str()">
</form>
əɡɵɤ JavaScript ɩɨɡɜɨɥɹɟɬ ɩɪɨɫɬɨ ɨɫɭɳɟɫɬɜɢɬɶ ɩɟɪɟɜɨɞ ɢɡ ɲɟɫɬɧɚɞɰɚɬɟɪɢɱɧɨɣ ɋɋ ɜ ɞɟɫɹɬɢɱɧɭɸ CC. ɉɪɢ ɷɬɨɦ ɰɟɥɵɟ ɲɟɫɬɧɚɞɰɚɬɟɪɢɱɧɵɟ ɱɢɫɥɚ
ɞɨɥɠɧɵ ɡɚɩɢɫɵɜɚɬɶɫɹ ɜ ɬɚɤɨɣ ɮɨɪɦɟ:
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