strcmp : strcmp « string.h « C Tutorial

Item	Value
Header file	string.h
Declaration	int strcmp(const char str1, const char str2);
Function	lexicographically compares two strings
Return	returns an integer based on the outcome:

Value	Meaning
< 0	str1 is less than str2
0	str1 is equal to str2
>0	str1 is greater than str2

#include<stdio.h>
#include<string.h>

int main(void){
    char s[80];

    printf("Enter password: ");
    gets(s);
    if(strcmp(s, "pass")) {
      printf("Invalid Password\n");
      return 0;
    }
    return 1;
}

Enter password: 34
Invalid Password

24.8.strcmp
	24.8.1.	strcmp