密码强度等级（C语言实现，注意多个输入输出的处理）

链接：https://www.nowcoder.com/questionTerminal/52d382c2a7164767bca2064c1c9d5361?answerType=1&f=discussion
来源：牛客网

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

	int main()
{
    char str[10000];
while(scanf("%s",str)!=EOF){ // 变量初始化都要在whil循环里面，因为对每次读到的数据都要重新开始计算！！！一定不能放在外面，会导致自测用例通过，但提交调试不通过，即导致不支持多次输入并计算其对应结果
    int len=0;
    int sscore=0;
    int i;
    int flag_l = 0;
    int flag_b = 0; int num=0;
    int sym=0;

len=strlen(str);
 //   printf("len=%d\n",len);

    if(len<=4){
        sscore += 5;
  //      printf("len<=4,sscore=%d\n",sscore);
    } else if(len>=5 && len<=7) {
        sscore += 10;
  //       printf("len>=5,sscore=%d\n",sscore);
    } else{
        sscore += 25;
 //      printf("len>7,sscore=%d\n",sscore);
    }

    for(i=0;i<len;i++){
  //      printf("str[%d]=%c\n",i,str[i]);
        if(flag_b!=1 && (str[i]>='A' && str[i]<='Z')){
            flag_b = 1;
        }
        if(flag_l!=1 && (str[i]>='a' && str[i]<='z')){
            flag_l = 1;
        }
        if(str[i]>='0' && str[i]<='9'){
            num++;
       //     printf("num=%d\n",num);
        }
        if((str[i]>=0x21&&str[i]<=0x2F) ||(str[i]>=0x3A&&str[i]<=0x40) ||
           (str[i]>=0x5B&&str[i]<=0x60) || (str[i]>=0x7B&&str[i]<=0x7E)){
            sym++;
       //     printf("sys=%d\n",sym);
        }
    }

    if(flag_l==1 && flag_b==1){
        sscore += 20;
  //      printf("l=b=1,score=%d\n",sscore);
    }else if((flag_l==1 && flag_b==0) ||(flag_l==0 && flag_b==1)){
        sscore += 10;
   //     printf("sym==0,score=%d\n",sscore);
    }

    if(num==1){
        sscore += 10;
  //      printf("num==1,score=%d\n",sscore);
    }else if(num>1){
        sscore += 20;
  //      printf("num>1,score=%d\n",sscore);
    }

    if(sym==1){
        sscore += 10;
  //      printf("sym==1,score=%d\n",sscore);
    }else if(sym>1){
        sscore += 25;
  //      printf("sym>1,score=%d\n",sscore);
    }

    if(num!=0 && flag_l!=0 && flag_b!=0 && sym!=0){
        sscore+=5;
  //      printf("+5,score=%d\n",sscore);
    }else if(num!=0 && sym!=0 && (flag_l==1 || flag_b==1)){
        sscore+=3;
  //      printf("+3,score=%d\n",sscore);
    }else if(num!=0 && (flag_l==1 || flag_b==1)){
        sscore+=2;
  //      printf("+2,score=%d\n",sscore);
    }


 //   printf("flag_l=%d,flag_b=%d,num=%d,sym=%d,sscore=%d\n",flag_l,flag_b,num,sym,sscore);
    if(sscore>=90){
        printf("VERY_SECURE\n");
    }else if(sscore>=80){
        printf("SECURE\n");
    }else if(sscore>=70){
        printf("VERY_STRONG\n");
    }else if(sscore>=60){
        printf("STRONG\n");
    }else if(sscore >=50){
        printf("AVERAGE\n");
    }else if(sscore>=25){
        printf("WEAK\n");
    }else{
        printf("VERY_WEAK\n");
    }
}    
    return 0; }