The strcmp() function in C is used for comparing two string and checking if they are equal or not. strcmp() function compares two strings character by character from the first character until the end of one of the string occurs then returns the result.
And the parameters are:
|*leftStr||The pointer to the first character array.|
|*rightStr||This pointer to the second character array.|
This function returns the following values:
0: If both strings are equal means all characters in the string are same then it will return 0.
Greater than zero (Positive Integer): It returns a value greater than zero when the ASCII value of the first unmatched character in leftStr is greater than second.
Less than zero (Negative): It returns value less than zero when ASCII value of the first unmatched character in leftStr is less than second.
Following is the example for strcmp() function in C.
// C program for illustration of function strcmp in C Language
char string1 = "Programming";
char string2 = "PROGRAMMING";
char string3 = "programming";
char string4 = "Programming";
result = strcmp(string1, string2);
printf("comparing string1 to string2 = %d\n", result);
result = strcmp(string1, string3);
printf("comparing string1 to string3 = %d\n", result);
result = strcmp(string1, string4);
printf("comparing string1 to string4 = %d\n", result);
The output should be:
comparing string1 to string2 = 32
comparing string1 to string3 = -32
comparing string1 to string4 = 0