Data update

Task/Determine-if-a-string-is-numeric/C++/determine-if-a-string-is-numeric-1.cpp

@@ -1,28 +1,11 @@
-#include <sstream> // for istringstream
+#include <cctype>
+#include <cstdlib>
 
-using namespace std;
-
-bool isNumeric( const char* pszInput, int nNumberBase )
-{
-	istringstream iss( pszInput );
-
-	if ( nNumberBase == 10 )
-	{
-		double dTestSink;
-		iss >> dTestSink;
-	}
-	else if ( nNumberBase == 8 || nNumberBase == 16 )
-	{
-		int nTestSink;
-		iss >> ( ( nNumberBase == 8 ) ? oct : hex ) >> nTestSink;
-	}
-	else
-		return false;
-
-	// was any input successfully consumed/converted?
-	if ( ! iss )
-		return false;
-
-	// was all the input successfully consumed/converted?
-	return ( iss.rdbuf()->in_avail() == 0 );
+bool isNumeric(const char *s) {
+    if (s == nullptr || *s == '\0' || std::isspace(*s)) {
+        return false;
+    }
+    char *p;
+    std::strtod(s, &p);
+    return *p == '\0';
 }

Task/Determine-if-a-string-is-numeric/C++/determine-if-a-string-is-numeric-2.cpp

@@ -1,7 +1,28 @@
+#include <sstream> // for istringstream
+
+using namespace std;
+
 bool isNumeric( const char* pszInput, int nNumberBase )
 {
-	string base = "0123456789ABCDEF";
-	string input = pszInput;
+	istringstream iss( pszInput );
 
-	return (input.find_first_not_of(base.substr(0, nNumberBase)) == string::npos);
+	if ( nNumberBase == 10 )
+	{
+		double dTestSink;
+		iss >> dTestSink;
+	}
+	else if ( nNumberBase == 8 || nNumberBase == 16 )
+	{
+		int nTestSink;
+		iss >> ( ( nNumberBase == 8 ) ? oct : hex ) >> nTestSink;
+	}
+	else
+		return false;
+
+	// was any input successfully consumed/converted?
+	if ( ! iss )
+		return false;
+
+	// was all the input successfully consumed/converted?
+	return ( iss.rdbuf()->in_avail() == 0 );
 }

Task/Determine-if-a-string-is-numeric/C++/determine-if-a-string-is-numeric-3.cpp

@@ -1,3 +1,7 @@
-bool isNumeric(const std::string& input) {
-    return std::all_of(input.begin(), input.end(), ::isdigit);
+bool isNumeric( const char* pszInput, int nNumberBase )
+{
+	string base = "0123456789ABCDEF";
+	string input = pszInput;
+
+	return (input.find_first_not_of(base.substr(0, nNumberBase)) == string::npos);
 }

Task/Determine-if-a-string-is-numeric/C++/determine-if-a-string-is-numeric-4.cpp

@@ -0,0 +1,3 @@
+bool isNumeric(const std::string& input) {
+    return std::all_of(input.begin(), input.end(), ::isdigit);
+}

Task/Determine-if-a-string-is-numeric/C/determine-if-a-string-is-numeric.c

@@ -1,10 +1,12 @@
 #include <ctype.h>
+#include <stdbool.h>
 #include <stdlib.h>
-int isNumeric (const char * s)
-{
-    if (s == NULL || *s == '\0' || isspace(*s))
-      return 0;
-    char * p;
-    strtod (s, &p);
+
+bool isNumeric(const char *s) {
+    if (s == NULL || *s == '\0' || isspace(*s)) {
+        return false;
+    }
+    char *p;
+    strtod(s, &p);
     return *p == '\0';
 }