Determine if a string is numeric: Difference between revisions
added C translation to C++
(→BQN: add) |
(added C translation to C++) |
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Line 1,531:
<syntaxhighlight lang="c">#include <ctype.h>
#include <stdbool.h>
#include <stdlib.h>
if (s == NULL || *s == '\0' || isspace(*s)) {
return
strtod(s, &p);
return *p == '\0';
}</syntaxhighlight>
Line 1,572 ⟶ 1,574:
=={{header|C++}}==
{{trans|C}}<syntaxhighlight lang="cpp">#include <cctype>
#include <cstdlib>
bool isNumeric(const char *s) {
if (s == nullptr || *s == '\0' || std::isspace(*s)) {
return false;
}
char *p;
std::strtod(s, &p);
return *p == '\0';
}</syntaxhighlight>
Using stringstream:
<syntaxhighlight lang="cpp">#include <sstream> // for istringstream
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