怎么判断输入是否重复?

[Damn_boy]

#include<stdio.h>
void main()
{
    int j=0,num,i=0;
	int a[5]={0};
	
	do
	{
           top:printf("enter you number\n");
               scanf("%d",&num);
		
	   i=0;
          while(i<5)
         {
		  if(num==a[i])
		  { 
			  printf("wrong number\n");
			  goto top;
		  }
		  i++;
	  }


	  a[j]=num;
	  j++;
	}while(j<5);
	
        for(j=0;j<=4;j++)
	    printf("a[%2d]=%2d\n",j,a[j]);
}

帮忙改一下,不用goto,
之前好象想到了 ,没记下来,又忘记了

[liliangbao]

int main(int argc, char *argv[])
{
    int j=0,num,i=0;
    int a[5]={0};
    
    do
    {
        printf("enter you number\n");
        scanf("%d",&num);
        
        i=0;
        while(i<5)
        {
            if(num == a[i])
            { 
              break;
            }
            i++;
        }

        if(i == 5)
        {
            a[j]=num;
            j++;
        }    
    }while(j<5);
    
    for(j=0;j<=4;j++)
    printf("a[%2d]=%2d\n",j,a[j]);
       	
    return 0;
}

[猫已经找不回了]

就是接收数据,然后判断之前是否已经接收,需要写的这么麻烦吗?

[liangkaiyu]

while(i<5)
         {
          if(num==a[i])
          { 
              printf("wrong number\n");
            //  goto top;

				printf("enter you number\n");//
					scanf("%d",&num);//
	
				i=0;//
          }
          i++;
		  }

[mengde007]

for(int i=0;i<5;)
{
scanf("%d",&a[i]);
for(int j=0;j<=i;j++)
{
if(a[i]==a[j])
break;
i++;
}
}

[amwly888]

#include<stdio.h>
void main()
{
    int j=0,num,i=0;
    int a[5]={0};
    bool wrong=false;
    
    do
    {
       printf("enter you number\n");
       scanf("%d",&num);
        
       i=0;
       wrong=false;
       while(i<5)
       {
          if(num==a[i])
          { 
              printf("wrong number\n");
              wrong=true;
              break;
          }
          i++;
       }
       if(wrong)continue;

      a[j]=num;
      j++;
    }while(j<5);
    
        for(j=0;j<=4;j++)
        printf("a[%2d]=%2d\n",j,a[j]);
}

[mengde007]

for(int i=0;i <5;)
{
scanf("%d",&a[i]);
for(int j=0;j <=i;j++)
{
if(a[i]==a[j])
break;
}
i++;
}

[猫已经找不回了]

#define MAX 5000
void main()
{
    int j=0,num,i=0;
    int a[5]={0},bit_map[5000]={0};
	for(i=0;i<5;i++)
	{
		int mark=0;
        do
		{
			if(mark>0)
				printf("wrong number\n");
			printf("enter you number\n");
			scanf("%d",&num);
			mark++;
		}
		while(bit_map[num]==1);
		bit_map[num]=1;
		a[i]=num;
	}
        for(j=0;j<=4;j++)
        printf("a[%2d]=%2d\n",j,a[j]);
}

维持你的愿意

[freestyIe]

就这么个问题，还真是百花怒放啊
加个bool变量不就OK了
看了下 同意5楼的
比较和楼主保持一致