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What is strcoll() Function in C language?
The C library function int strcoll(const char *str1, const char *str2) compares string str1 to str2. The result is dependent on the LC_COLLATE setting of the location.
An array of characters is called a string
Declaration
Given below is the declaration of an array −
char stringname [size];
For example − char string[50]; string of length 50 characters
Initialization
- Using single character constant −
char string[10] = { ‘H’, ‘e’, ‘l’, ‘l’, ‘o’ ,‘\0’}- Using string constants −
char string[10] = "Hello":;
Accessing − There is a control string "%s" used for accessing the string till it encounters ‘\0’
The Strcoll() Function
This function is same as strcmp() function, it compares two strings and returns an integer based on the value of comparison.
Declaration
Given below is the declaration of strcoll() function −
int strcoll(const char *string1, const char *string2)
Here,
- string1 refers to First String.
- string2 refers to Second String.
Return value of strcoll()
> 0 when ASCII value of first unmatched char in string string1 is greater than string2.
< when ASCII value of first unmatched char in string string1 is less than string2.
=0 if both strings are equal.
Example
The following example shows the usage of strcoll() function.
#include <stdio.h>
#include <string.h>
int main () {
char string1[20];
char string2[20];
int final;
strcpy(string1, "WELCOME");
strcpy(string2, "Welcome to the world!");
final = strcoll(string1, string2);
if(final > 0){
printf(" string1 is greater than string2");
} else if(final < 0) {
printf("string1 is less than string2");
} else {
printf("string1 and string2 are equal");
}
return 0;
}Output
When the above program is executed, it produces the following result −
string1 is less than string2
Example
Let’s see another program.
Following is the program for comparing two strings using strcoll at runtime −
#include <stdio.h>
int main (){
char string1[20];
char string2[20];
int final;
printf("enter string1:
");
gets(string1);
printf("enter string2:
");
gets(string2);
final = strcoll(string1, string2);
if(final > 0){
printf(" string1 is greater than string2");
}
else if(final < 0){
printf("string1 is less than string2");
}
else{
printf("string1 and string2 are equal");
}
return 0;
}Output
When the above program is executed, it produces the following result −
enter string1: Tutorails Point enter string2: Point string1 is greater than string2
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