Count the number of identical characters in a string. Count uppercase letters as lowercase letters. Example: input string bbBCcaA *, output *: 1 a: 2 B: 3 c: 2
Asp.net
| The Code is as follows: |
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# Include <iostream>
Using namespace std;
Const int MAX_NUMBER = 200;
// Count the number of identical characters
Void Calc (const char * str, int len );
Int main ()
{
Char pch [MAX_NUMBER];
// Input string
Cin. getline (pch, MAX_NUMBER ); Int length = strlen (pch ); Calc (pch, length ); Return 0;
} Void Calc (const char * str, int len)
{
Int LetterCounts [256]; // This array is the key. It stores the number of Spanish characters.
Int I;
For (I = 0; I <256; I ++)
LetterCounts [I] = 0;
For (I = 0; I <len; I ++)
{
If (str [I]> = 'A' & str [I] <= 'Z ')
LetterCounts [str [I] + 32] ++; // lowercase
Else
LetterCounts [str [I] ++;
}
For (I = 0; I <256; I ++)
{
If (LetterCounts [I]> 0)
Cout <(char) I <":" <LetterCounts [I] <endl;
}
} |
Php
| The Code is as follows: |
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<? Php
// This method is purely a back-function and is not explained;
Function countStr ($ str ){
$ Str_array = str_split ($ str );
$ Str_array = array_count_values ($ str_array );
Arsort ($ str_array );
Return $ str_array;
}
// The following is an example;
$ Str = "asdfgfdas323344 ##$ fdsdfg * $ ** $ 443563536254fas ";
Print_r (countStr ($ str ));
?> <? Php
// This method has some data structure ideas, but it is quite understandable :)
Function countStr2 ($ str ){
$ Str_array = str_split ($ str );
$ Result_array = array ();
Foreach ($ str_array as $ value) {// determines whether the character is a new type. If yes, It is set to 1. If not, it is automatically added;
If (! $ Result_array [$ value]) {
$ Result_array [$ value] = 1;
} Else {
$ Result_array [$ value] ++;
}
}
Arsort ($ result_array );
Return $ result_array;
}
// The following is an example;
$ Str = "asdfgfdas323344 ##$ fdsdfg * $ ** $ 443563536254fas ";
Var_dump (countStr2 ($ str ))
?> <? Php
// This method is purely a poor version of solution 1. First, find the total classes of all characters, and then use the substr_count function one by one.
Function countStr3 ($ str ){
$ Str_array = str_split ($ str );
$ Unique = array_unique ($ str_array );
Foreach ($ unique as $ v ){
$ Result_array [$ v] = substr_count ($ str, $ v );
}
Arsort ($ result_array );
Return $ result_array;
}
// The following is an example;
$ Str = "asdfgfdas323344 ##$ fdsdfg * $ ** $ 443563536254fas ";
Var_dump (countStr3 ($ str ));
?> |
