c - long int 数组导致错误 : subscripted value is neither array nor pointer nor vector

Question

我知道此错误消息还有其他问题，但没有一个能解决我的情况下的错误消息 这里的代码找到第一个具有超过 N 个除数的三角形数的值，其中 N 是输入(这个问题通常在欧拉项目中发现)我使用 sieve of Eratosthenes生成素数列表，并由 Divisor function 使用 我缓存了 N = 500->1000 的三角数的值 为了省时间。在 GCC 上编译时我发现了这个错误消息

 error: subscripted value is neither array nor pointer nor vector
 if(n>=500) printf("%li\n",tri[n-500]);
                              ^

这是完整的代码

#include <stdio.h>
#include <stdlib.h>
#define MAX 1000000
#define NofPrime 78498
int main(){
  long tri[]  = {76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,76576500,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,103672800,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,236215980,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320,842161320};
  unsigned char *table = malloc(sizeof(char)*MAX);
  int i,j,c=0;
  unsigned int *prime = malloc(sizeof(unsigned int)*NofPrime);
  for(i=0;i<MAX;i++)table[i] = 0;
  for(i=2;i<MAX;i++){
  if(table[i]==0){
   prime[c] = i;
   c++;
   for(j=2;i*j<MAX;j++) table[i*j] = 1;
  }}
  free(table);
  int t;
  scanf("%i",&t);
  while(t>0){
   unsigned long max=1,counter,tri,n,tricpy;
    scanf("%li",&n);
    if(n>=500) printf("%li\n",tri[n-500]);
    else  while(max++){
      tri = (1+max)*max/2;
      tricpy = tri;
      counter=1;
      int i,j;
      for(i=0;prime[i] <= tricpy;i++){
        j =1;
        while(tricpy%prime[i]==0){
          j++;
          tricpy/=prime[i];
        }
        counter*=j;
      }
      if(counter>n){
        printf("%lu,",tri);
        break;
      }
    }
    t--;
  }
  free(prime);
}

Answer 1

tri的定义

unsigned long max=1,counter,tri,n,tricpy;

将是

中使用的那个

if(n>=500) printf("%li\n",tri[n-500]);

所以 tri 确实不是数组或指针。