Format
#include <strings.h>
int srtcasecmp(const char *string1, const char *string2);
Language Level: XPG4
Threadsafe: Yes.
Locale Sensitive: The behavior of this function might be affected by the LC_CTYPE category of the current locale. This function is not available when LOCALETYPE(*CLD) is specified on the compilation command. For more information, see Understanding CCSIDs and Locales.
Description
The strcasecmp() function compares string1 and string2 without sensitivity to case. All alphabetic characters in string1 and string2 are converted to lowercase before comparison.
The strcasecmp() function operates on null terminated strings. The string arguments to the function are expected to contain a null character ('\0') marking the end of the string.
Return Value
The strcasecmp() function returns a value indicating the relationship between the two strings, as follows:
Value | Meaning |
Less than 0 | string1 less than string2 |
0 | string1 equivalent to string2 |
Greater than 0 | string1 greater than string2 |
Example that uses strcasecmp()
This example uses strcasecmp() to compare two strings.
#include <stdio.h>
#include <strings.h>
int main(void)
{
char_t *str1 = "STRING";
char_t *str2 = "string";
int result;
result = strcasecmp(str1, str2);
if (result == 0)
printf("Strings compared equal.\n");
else if (result < 0)
printf("\"%s\" is less than \"%s\".\n", str1, str2);
else
printf("\"%s\" is greater than \"%s\".\n", str1, str2);
return 0;
}
/******** The output should be similar to: ***************
Strings compared equal.
***********************************/
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