strcmp 做 string_compare

1. #include <stdio.h>
   
2. #include <stdlib.h>
   
3. #include <time.h>
   
4. #include <string.h>
   
5. 
   
6. int main(void)
   
7. {
   
8. char str[1000] = "Hello, world"; // 輸入字串
   
9. char str2[6] = "or";
   
10. int result; // 比對結果
    
11. int i;
    
12. 
    
13. //scanf("%s", &str);
    
14. 
    
15. result = strcmp ("hello", "hello");
    
16. printf ("result:%d\n", result); //=> 0 These two strings are the same. */
    
17. 
    
18. result = strcmp ("hello", "Hello");
    
19. printf ("result:%d\n", result); //=> 1 Comparisons are case-sensitive. */
    
20. 
    
21. result = strcmp ("hello", "world");
    
22. printf ("result:%d\n", result); //=> -1 The character 'h' comes before 'w'. */
    
23. 
    
24. result = strcmp ("hello", "hello, world");
    
25. printf ("result:%d\n", result); //=> -1 Comparing a null character against a comma. */
    
26. 
    
27. result = strncmp ("hello", "hello, world", 5);
    
28. printf ("result:%d\n", result); //=> 0 The initial 5 characters are the same. */
    
29. 
    
30. result = strncmp ("hello, world", "hello, stupid world!!!", 5);
    
31. printf ("result:%d\n", result); //=> 0 The initial 5 characters are the same. */
    
32. 
    
33. system("pause");
    
34. return 0;
    
35. }

複製代碼

利用result值可做目標搜尋...

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