Programming-Idioms

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2020-12-11, 07:28:56

2020-12-28, 22:41:21

Idiom #110 Check if string is blank

Set boolean blank to true if string s is empty, or null, or contains only whitespace ; false otherwise.

Set boolean blank to true if string s is empty, or null, or contains only whitespace ; false otherwise.

#include <ctype.h>
#include <stdbool.h>

#include <ctype.h>
#include <stdbool.h>

bool blank = true;
for (const char *p = s; *p; p++) {
	if (!isspace(*p)) {
		blank = false;
		break;
	}
}

bool blank = true;
for (const char *p = s; *p; p++) {
	if (!isspace(*p)) {
		blank = false;
		break;
	}
}

type of s is char *

s has type char*

http://www.cplusplus.com/reference/cctype/isspace/

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