密码的输入、确认和判断比较

逃离我推掉我的手 2022-04-13 15:20 255阅读 0赞

基础版：利用strcmp函数进行字符串的比较

进阶版：加入重新输入密码

#include<stdio.h>
    #include<string.h>
    #include<stdlib.h>
    /* 简单密码比较 */
    /* written by Chen Gengru */
    /* updated on 2018-11-30 */
    int main()
    {
        
    	char password1[20], password2[20];
    	
    	int iWrongcheck;
    	
    	retype: printf("Please input password\n");
    	        scanf("%s", &password1);
    	
    	printf("check your password\n");
    	scanf("%s", &password2);
    	
    		if (strcmp(password1, password2) == 0)
    	    {
        
    	       printf("correct!\n");
    	    }
    	    else
        	{
        
    	    	printf("wrong! Press 1 to retype password. Press 0 to end.\n");
    	    	scanf("%d", &iWrongcheck);
    	    	if (iWrongcheck)
    	    	{
        
    	    		goto retype;
    			}
    			else
    			{
        
    				return 0;
    			}
         	}
    	
    	return 0;
     }

高级版：在密码输入和确认的基础上，判断密码，若重复输错三次，结束

#include<stdio.h>
    #include<stdlib.h>
    #include<string.h>
    /* 密码比较（确认加判断） */
    /* written by Chen Gengru */
    /* updated on 2018-12-6 */ 
    int main()
    {
        
    	char password1[20], password2[20], password3[20];
    	
    	int i, iWrongcheck;
    	
    	retype: printf("Please define password\n");
    	        scanf("%s", &password1);
    	
    	printf("check your password\n");
    	scanf("%s", &password2);
    	
    		if (strcmp(password1, password2) == 0)
    	    {
        
    	       printf("correct!\n");
    	    }
    	    else
        	{
        
    	    	printf("wrong! Press 1 to retype password. Press 0 to end.\n");
    	    	scanf("%d", &iWrongcheck);
    	    	if (iWrongcheck)
    	    	{
        
    	    		goto retype;
    			}
    			else
    			{
        
    				return 0;
    			}
         	}
         	
         printf("Please input your password.\n");
    	 scanf("%s", &password3);
    	
    	for (i == 0; i < 3; i++)
    	{
        
    		if (strcmp(password1, password3) == 0)
    		{
        
    			printf("Correct! Welcome!\n");
    			return 0;
    		}
    		else
    		{
        
    			printf("Wrong password! Please input again!\n");
    			scanf("%s", &password3);
    		}
    	}
    	
    	printf("You have input the password wrongly for three times! END\n");
    	
    	return 0;
     }