c - 使用数组时 C 中的段错误

Question

1. 运行此代码时，会显示段错误。但是当address(LessThan)countarray改为address<=countarray时，就可以了。我只想让它少打印一个数组，但它不允许。

   #include <stdio.h>
   #include <stdlib.h>
   
   int main()
   {
   int n,check,divisor,countarray,address;
   int pn[100];
   
   for (n=2;n<100;n++){
       for (divisor=2;divisor<n;divisor++){
           if ((n/divisor)*divisor==n)    //if (n is not a prime number) 
               check++;
       }
       if (check==0){                    //if its a prime number,
           pn[countarray]=n;
           countarray++;
       }
   
       check=0;
   
   }
   
   for (address=0;address<countarray;address++)
       printf("address for %d is %d and ",pn[address],address);
   
   
   return 0;
   }
   

Answer 1

条件没有问题address<countarray ，您应该初始化 check 和 countarray 变量。

int n,check=0,divisor,countarray=0,address;