Chapter 2
Foundations
2.1 A first C++ program
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// Program : power8 .C
// Raise a number to the eighth power .
# include < iostream >
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int main ()
{
// input
std :: cout < < " Compute a ^8 for a =? ";
int a;
std :: cin > > a;
// computation
int b = a * a ; // b = a ^2
b = b * b;
// b = a ^4
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// output b * b , i .e . , a ^8
std :: cout < < a < < " ^8 = " < < b * b < < " .\ n";
return 0;
}
Program 1:
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Compute a ^8 for a =? 2
2^8 = 256.
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2.1.2 Comments and layout
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2.1.3 Include directives
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2.1.8 Variables
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2.1.9 Identifiers and names
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2.1.10 Objects
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2.1.11 Expressions
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2.1.14 Statements
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Declaration statement.
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/*
Program : power8 . C
3 Raise a number to the power 8.
*/
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Define variables where needed!
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// Program : power8 .C
// Raise a number to the eighth power .
# include < iostream >
ÈÉ
Ê
using namespace std ;
1X
Ë
Ì
ÄHÍ
Ä Ä
ÄHÅ
ÄHÆ
ÄFÇ
ÄHÉÈ
_
3 3
int main ()
{
// input
cout < < " Compute x ^8 for x =? ";
int a;
cin > > a;
// computation
int b = a * a ; // b = a ^2
b = b * b;
// b = a ^4
Ä
Ä Ê
ÄHË
ÄHÌ
ÅÍ
Å Ä
8
ÅÅ
:c
// output b * b , i .e . , a ^8
cout < < a < < " ^8 = " < < b * b < < " .\ n ";
return 0;
}
Program 3:
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using namespace
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