C语言strcmp()函数

#include<stdio.h>
#include <string.h>  
int main(){  
  char str1[20],str2[20];  
  printf("Enter 1st string: ");  
  gets(str1);//reads string from console  
  printf("Enter 2nd string: ");  
  gets(str2);  
  if(strcmp(str1,str2)==0)  
      printf("Strings are equal");  
  else  
      printf("Strings are not equal");  
 return 0;  
}  

Enter 1st string: hello
Enter 2nd string: hello
Strings are equal