出现错误[Error] previously used here和[Error] duplicate case value怎么解决

[weixin_53769504]

int main()// 主函数
{
char name[20],num[20];
char a0[20],b0[20],c0[30];
char a1[20],b1[20],c1[20];
int m,i,g;
int w,k;
int flag=0;
while(1)
{
switch(menu_select() )
{
case 1:
m=Create(H);//创建辅助数组
break;
case 2:
input_name(Inf,m,H);//以姓名为关键字创建哈希表
Print_name(H);
while(1)
{
flag=0;
printf("\n");
printf("1: 查找\n");
printf("2: 插入\n");
printf("3: 删除\n");
printf("0: 返回\n");
printf(" 输入(0-3) :\n");
scanf("%d",&g);
switch(g)
{
case 1:
printf("\n 请输入要查找的名字: \n");
scanf("%s",name);
k=Search_name(H,name);
printf(" 查找该人的信息是: \n");
printf(" 该人的姓名是:%s\n",H[k].name);
printf(" 该人的电话号码是:%s\n" ,H[k].num);
printf(" 该人的地址是 :%s\n" ,H[k].add);
break;
case 2:
printf("\n 请输入要插入的信息: \n");
printf(" 插入的姓名是 :");
scanf("%s",a0);
printf(" 插入的电话是:");
scanf("%s",b0);
printf(" 插入的地址是:");
scanf("%s" ,c0);
Insert_name(H,a0,b0,c0);
printf("插入后的结果:\n");
Print_name(H);
break;
case 3:
printf(" 请输入要删除的名字 :\n");
scanf("%s",name);
Del_name(H,name);
printf(" 删除后的信息 :\n");
Print_name(H);
break;
case 0:
flag=1;
break;
}
if(flag==1)
break;
}
for(i=0;i<30;i++)//将哈希表清空
{
strcpy(H[i].add,"\0");
strcpy(H[i].num,"\0");
strcpy(H[i].name,"\0");
}
break;
printf("\n");
case 3:
input_num(Inf,m,H);//以电话号码为关键字创建哈希表
Print_num(H);

while(1)
{
flag=0;
printf("\n");
printf("1: 查找\n");
printf("2: 插入\n");
printf("3: 删除\n");
printf("0: 返回\n");
printf(" 输入(0-3):\n");
scanf("%d,&g");
switch(g);
{
case 1:
printf(" 输入要查找的号码: \n");
scanf("%s,num");
w=Search_num(H,num);
printf(" 查找该人的信息是 : \n");
printf(" 该人的姓名是: %s\n",H[w].name);
printf(" 该人的电话号码是: %s\n",H[w].num);
printf(" 该人的地址是: %s\n",H[w].add);
break;
case 2:
printf("\n 请输入要插入的信息: \n");
printf(" 插入的姓名是:");
scanf("%s",a1);
printf(" 插入的电话是:");
scanf("%s",b1);
printf(" 插入的地址是:");
scanf("%s",c1);
Insert_num(H,a1,b1,c1);
printf(" 插入后的结果:\n");
Print_num(H);
break;

case 3:

printf(" 请输入要删除的号码: ");
scanf("%s",num);
Del_num(H,num);
printf(" 删除后的信息: \n");
Print_num(H);
break;

case 0:

flag=1;
break;
}
if(flag==1)

break;
}
for(i=0;i<30;i++)//将哈希表清空
{
strcpy( H[i].add,"\0");
strcpy( H[i].num,"\0");
strcpy( H[i].name,"\0");

}

break;
case 0:
printf(" 欢迎使用! ");
exit(0);
break;
}
system("pause");
}
}


显示错误：实验.cpp [Error] duplicate case value
实验.cpp [Error] previously used here
该怎么解决呢

[qzjhjxj]

楼主代码没贴全，错误部分见标出：

int main()// 主函数
{
  char name[20],num[20];
  char a0[20],b0[20],c0[30];
  char a1[20],b1[20],c1[20];
  int m,i,g;
  int w,k;
  int flag=0;
  while(1)
    {
       switch(menu_select())
            {
              case 1:
                    m=Create(H);//创建辅助数组
                    break;
              case 2:
                    input_name(Inf,m,H);//以姓名为关键字创建哈希表
                    Print_name(H);
                    while(1)
                         {
                           flag=0;
                           printf("\n");
                           printf("1:   查找\n");
                           printf("2:   插入\n");
                           printf("3:   删除\n");
                           printf("0:   返回\n");
                           printf("     输入(0-3) :\n");
                           scanf("%d",&g);
                           switch(g)
                                 {
                                  case 1:
                                    printf("\n     请输入要查找的名字: \n");
                                    scanf("%s",&name);             //scanf("%s",name);
                                    k=Search_name(H,name);
                                    printf("    查找该人的信息是: \n");
                                    printf("    该人的姓名是:%s\n",H[k].name);
                                    printf("    该人的电话号码是:%s\n" ,H[k].num);
                                    printf("    该人的地址是 :%s\n" ,H[k].add);
                                    break;
                                  case 2:
                                    printf("\n    请输入要插入的信息: \n");
                                    printf("     插入的姓名是 :");
                                    scanf("%s",&a0);                //scanf("%s",a0);
                                    printf("     插入的电话是:");
                                    scanf("%s",&b0);                //scanf("%s",b0);
                                    printf("    插入的地址是:");
                                    scanf("%s" ,&c0);               //scanf("%s" ,c0);
                                    Insert_name(H,a0,b0,c0);
                                    printf("插入后的结果:\n");
                                    Print_name(H);
                                    break;
                                  case 3:
                                    printf("     请输入要删除的名字 :\n");
                                    scanf("%s",&name);             //scanf("%s",name);
                                    Del_name(H,name);
                                    printf("    删除后的信息 :\n");
                                    Print_name(H);
                                    break;
                                  case 0:
                                    flag=1;
                                    break;
                                 }
                           if(flag==1)
                                break;
                         }
                    for(i=0;i<30;i++)//将哈希表清空
                       {
                         strcpy(H[i].add,"\0");
                         strcpy(H[i].num,"\0");
                         strcpy(H[i].name,"\0");
                       }
                    break;
                    //printf("\n");
              case 3:
                    input_num(Inf,m,H);//以电话号码为关键字创建哈希表
                    Print_num(H);
                    while(1)
                        {
                           flag=0;
                           printf("\n");
                           printf("1:  查找\n");
                           printf("2:  插入\n");
                           printf("3:  删除\n");
                           printf("0:  返回\n");
                           printf("     输入(0-3):\n");
                           scanf("%d",&g);                              //scanf("%d,&g");
                           switch(g);
                                 {
                                   case 1:
                                          printf("   输入要查找的号码: \n");
                                          scanf("%s",&num);             //scanf("%s,num");
                                          w=Search_num(H,num);
                                          printf("   查找该人的信息是 : \n");
                                          printf("   该人的姓名是:  %s\n",H[w].name);
                                          printf("   该人的电话号码是: %s\n",H[w].num);
                                          printf("   该人的地址是:  %s\n",H[w].add);
                                          break;
                                   case 2:
                                         printf("\n   请输入要插入的信息: \n");
                                         printf("     插入的姓名是:");
                                         scanf("%s",&a1);              //scanf("%s",a1);
                                         printf("    插入的电话是:");
                                         scanf("%s",&b1);              //scanf("%s",b1);
                                         printf("    插入的地址是:");
                                         scanf("%s",&c1);              //scanf("%s",c1);
                                         Insert_num(H,a1,b1,c1);
                                         printf("    插入后的结果:\n");
                                         Print_num(H);
                                         break;
                                   case 3:
                                         printf("   请输入要删除的号码: ");
                                         scanf("%s",&num);            //scanf("%s",num);
                                         Del_num(H,num);
                                         printf("   删除后的信息: \n");
                                         Print_num(H);
                                         break;
                                   case 0:
                                         flag=1;
                                         break;
                                 }
                           if(flag==1)
                               break;
                        }
                    for(i=0;i<30;i++)//将哈希表清空
                       {
                           strcpy(H[i].add,"\0");
                           strcpy(H[i].num,"\0");
                           strcpy(H[i].name,"\0")
                       }
                    break;
              case 0:
                    printf("  欢迎使用! ");
                    exit(0);
                    break;
            }
    }
  system("pause");
  return 0;
}

[maguangzhi]

两个重复的case 3