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POI get a number 2 when I reverse my string
 

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  1. POI get a number 2 when I reverse my string
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    <p>I wrote this code to reverse strings. It works well, but when I enter short strings like "american beauty," it actually prints "ytuaeb nacirema2." This is my code. I would like to know what is wrong with my code that prints a random 2 at the end of the string. Thanks</p> <pre><code>// This program prompts the user to enter a string and displays it backwards. #include &lt;iostream&gt; #include &lt;cstdlib&gt; using namespace std; void printBackwards(char *strPtr); // Function prototype int main() { const int SIZE = 50; char userString[SIZE]; char *strPtr; cout &lt;&lt; "Please enter a string (up to 49 characters)"; cin.getline(userString, SIZE); printBackwards(userString); } //************************************************************** // Definition of printBackwards. This function receives a * // pointer to character and inverts the order of the characters* // within it. * //************************************************************** void printBackwards(char *strPtr) { const int SIZE = 50; int length = 0; char stringInverted[SIZE]; int count = 0; char *strPtr1 = 0; int stringSize; int i = 0; int sum = 0; while (*strPtr != '\0') { strPtr++; // Set the pointer at the end of the string. sum++; // Add to sum. } strPtr--; // Save the contents of strPtr on stringInverted on inverted order while (count &lt; sum) { stringInverted[count] = *strPtr; strPtr--; count++; } // Add '\0' at the end of stringSize stringInverted[count] == '\0'; cout &lt;&lt; stringInverted &lt;&lt; endl; } </code></pre> <p>Thanks.</p>
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    1. PO
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    1. USVikdor
    1. USAmadeus Sánchez
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
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    2. PO
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    1. This table or related slice is empty.
    1. COString reversal is detarrevo....
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      1. POI get a number 2 when I reverse my string
      1. USTony Delroy
    2. COWow, `printBackwards` has lots of local variables! Some aren't used, and most aren't needed. `const char *end = std::reverse_copy(strPtr, strPtr + strlen(strPtr), stringInverted); *end = '\0';` Or, if you really like dense code: `*std::reverse_copy(strPtr, strPtr + strlen(strPtr), stringInverted) = '\0';`
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      1. POI get a number 2 when I reverse my string
      1. USPete Becker
 

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