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  1. #include<stdio.h>
  2. int main()
  3. {
  4.     int a, *pA;
  5.  
  6.     a = 5;
  7.     printf("a = %d\n", a);
  8.     pA = &a;
  9.     printf("pA = &a; ---> pA = %p, *pA = %d\n", pA, *pA);
  10.     pA = a;
  11.     printf("pA = a;  ---> pA = %p\n", pA);
  12.  
  13. //    printf("*pA = %d\n", *pA);
  14.       // ↑ printfの中で、アクセスが許可されていないメモリ(0x00000005番地)を
  15.       // アクセスしようとするので Segmentation fault が起きる
  16.  
  17.     return 0;
  18. }
Success #stdin #stdout 0.01s 1720KB
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stdin
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Standard input is empty
stdout
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a = 5
pA = &a; ---> pA = 0xbfe4b724, *pA = 5
pA = a;  ---> pA = 0x5
https://ideone.com/qhRlqh
language:
C (gcc 8.3)
created:
11 years ago
visibility:
secret

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