C ++ shortcut tutorial-Chapter 5-array and string (Part 1)

// -- C ++ shortcut tutorial -- Chapter 5 -- array and string (Part 1)
// -- Chapter 5 -- array and string
// -- 11/10/2005 Thurs.
// -- Computer lab
// -- Liwei

// -- Program #1 Array
# Include <iostream>
Using namespace STD;

Int main ()
{
Int sample [10];
Int T;
For (t = 0; t <10; t ++)
Sample [T] = T;
For (t = 0; t <10; t ++)
Cout <sample [T] <"";
Cout <Endl <"=========================" <Endl;
// Getchar ();
Return 0;
}

// -- Program #2 array rand () Use
# Include <iostream>
# Include <cstdlib>
Using namespace STD;

Int main ()
{
Int I, min_value, max_value;
Int list [10];
For (I = 0; I <10; I ++)
List [I] = rand ();
Cout <Endl <"=========================" <Endl;
For (I = 0; I <10; I ++)
Cout <list [I] <'';
Cout <Endl;

Min_value = list [0];
For (I = 1; I <10; I ++)
If (min_value> list [I])
Min_value = list [I];
Cout <"minimum value:" <min_value <Endl;
Max_value = list [0];
For (I = 1; I <10; I ++)
If (max_value <list [I])
Max_value = list [I];
Cout <"maximum value:" <max_value <Endl;

Cout <Endl <"=========================" <Endl;
// Getchar ();
Return 0;
}

// -- Program #3 an incorrect Program
# Include <iostream>
Using namespace STD;

Int main ()
{
Int crash [10], I;
For (I = 0; I <150; I ++)
Crash [I] = I;
For (I = 0; I <150; I ++)
Cout <crash [I] <'';

Cout <Endl <"=========================" <Endl;
// Getchar ();
Return 0;
}

// -- Program #4 sort arrays by bubble sort
# Include <iostream>
# Include <cstdlib>
Using namespace STD;

Int main ()
{
Int Nums [100];
Int A, B, T;
Int size;
Size = 100;
For (t = 0; t <size; t ++)
Nums [T] = rand ();

Cout <"original array is:/N ";
For (t = 0; t <size; t ++)
Cout <Nums [T] <'';
Cout <Endl <"=========================" <Endl;

For (A = 1; A <size; A ++) // traverse size-1 times
For (B = size-1; B> = A; B --) // The number of traversal times for each minimum value.
{
If (Nums [b-1]> Nums [B])
{
T = Nums [b-1];
Nums [b-1] = Nums [B];
Nums [B] = T;
}
}

Cout <"sorted array is:/N ";
For (t = 0; t <size; t ++)
Cout <Nums [T] <'';
Cout <Endl <"=========================" <Endl;
// Getchar ();
Return 0;
}

// -- Program #5 Use CIN to read strings from the keyboard
# Include <iostream>
Using namespace STD;

Int main ()
{
Char STR [80];
Cout <"enter a string :";
Cin> STR;
Cout <"here is your string :";
Cout <STR;
Cout <Endl <"=========================" <Endl;
// Getchar ();
Return 0;
}

// -- Program #6 Use gets () to read strings from the keyboard
# Include <iostream>
# Include <cstdio>
Using namespace STD;

Int main ()
{
Char STR [80];
Cout <"enter a string :";
Gets (STR );
Cout <"here is your string :";
Cout <STR;
Cout <Endl <"=========================" <Endl;
// Getchar ();
Return 0;
}

// -- Program #7 strcpy ()
# Include <iostream>
# Include <cstring>
Using namespace STD;

Int main ()
{
Char STR [80];
Strcpy (STR, "Hello! ");
Cout <STR;
Cout <Endl <"=========================" <Endl;
// Getchar ();
Return 0;
}

// -- Program #8 strcat ()
# Include <iostream>
# Include <cstring>
Using namespace STD;

Int main ()
{
Char S1 [20], S2 [10];
Strcpy (S1, "hello ");
Strcpy (S2, "there ");
Strcat (S1, S2 );
Cout <S1 <"" <S2;
Cout <Endl <"=========================" <Endl;
// Getchar ();
Return 0;
}

// -- Program #9 strcmp ()
# Include <iostream>
# Include <cstring>
Using namespace STD;

Bool password ();
Int main ()
{
If (password ())
Cout <"logged on./N ";
Else
Cout <"Access denied./N ";
Cout <Endl <"=========================" <Endl;
// Getchar ();
Return 0;
}

Bool password ()
{
Char s [80];
Cout <"Enter Password :";
Gets (s );
If (strcmp (S, "password "))
{
Cout <"invalid password./N ";
Return false;
}
Return true;
}

// -- Program #10 strcmp ()
# Include <iostream>
# Include <cstring>
# Include <cstdio>
Using namespace STD;

Int main ()
{
Char s [80];
For (;;)
{
Cout <"enter a string :";
Gets (s );
If (! Strcmp ("quit", S) break;
}
Cout <Endl <"=========================" <Endl;
// Getchar ();
Return 0;
}

// -- Program #11 strlen ()
# Include <iostream>
# Include <cstring>
# Include <cstdio>
Using namespace STD;

Int main ()
{
Char STR [80];
Cout <"enter a string :";
Gets (STR );
Cout <"length is:" <strlen (STR );
Cout <Endl <"=========================" <Endl;
// Getchar ();
Return 0;
}

// -- Program #12 reverse string Input
# Include <iostream>
# Include <cstring>
# Include <cstdio>
Using namespace STD;

Int main ()
{
Char STR [80];
Int I;
Cout <"enter a string :";
Gets (STR );

For (I = strlen (STR)-1; I> = 0; I --)
Cout <STR [I];
Cout <Endl <"=========================" <Endl;
// Getchar ();
Return 0;
}

// -- Program #13 4 string processing functions
# Include <iostream>
# Include <cstring>
# Include <cstdio>
Using namespace STD;

Int main ()
{
Char S1 [80], S2 [80];
Cout <"enter two strings :";
Gets (S1 );
Gets (S2 );

Cout <"lengths:" <strlen (S1) <''<strlen (S2) <Endl;

If (! Strcmp (S1, S2 ))
Cout <"the strings are equal./N ";
Else
Cout <"not equal./N ";

Strcat (S1, S2 );
Cout <"S1:" <S1 <''<" S2: "<S2 <Endl;

Strcpy (S1, S2 );
Cout <S1 <"and" <S2 <''<" are now the same./N ";

Cout <Endl <"=========================" <Endl;
// Getchar ();
Return 0;
}

// -- Program #14 converts a string to uppercase characters
# Include <iostream>
# Include <cstring>
# Include <cctype>
Using namespace STD;

Int main ()
{
Char STR [80];
Int I;
Strcpy (STR, "this is a test. abcdefghijk ....");

For (I = 0; STR [I]; I ++)
STR [I] = toupper (STR [I]);
Cout <STR;

Cout <Endl <"=========================" <Endl;
// Getchar ();
Return 0;
}

// -- Program #15. Two-dimensional array
# Include <iostream>
Using namespace STD;

Int main ()
{
Int T, I, num [3] [4];
For (t = 0; t <3; t ++)
{
For (I = 0; I <4; I ++)
{
Num [T] [I] = T * 4 + I + 1;
Cout <num [T] [I] <'';
}
Cout <Endl;
}
Cout <Endl <"=========================" <Endl;
// Getchar ();
Return 0;
}

// -- Program #16 two-dimensional array
# Include <iostream>
Using namespace STD;

Int sqrs [10] [2] = {
{1, 1 },
{2, 4 },
{3, 9 },
{4, 16 },
{5, 25 },
{6, 36 },
{7, 49 },
{8, 64 },
{9,81 },
{10,100 },
};

Int main ()
{
Int I, J;
Cout <"enter a number between 1 to 10 :";
Cin> I;

For (j = 0; j <10; j ++)
{
If (sqrs [J] [0] = I)
{Cout <"the square of" <I <"is" <sqrs [J] [1];
Break;
}
}
Cout <"/nthe square of" <I <"is" <sqrs [J] [1];
 

Cout <Endl <"=========================" <Endl;
// Getchar ();
Return 0;
}