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  1. #include <stdio.h>
  2. void Fun(int *par);
  3. int main(void)
  4. {
  5.     int arg = 1 ;
  6.     printf("arg = %d\n", arg);
  7.     Fun(&arg);                            /* 传递实参值的拷贝给函数 */
  8.     printf("arg = %d\n", arg);
  9.     return 0;
  10. }
  11. void Fun(int *par)
  12. {
  13.     printf("par = %d\n", *par);
  14.     *par = 2;                             /* 改变形参的值 */
  15. }
Success #stdin #stdout 0s 5320KB
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stdin
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Standard input is empty
stdout
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arg = 1
par = 1
arg = 2
https://ideone.com/nTxP2w
language:
C (gcc 8.3)
created:
5 days ago
visibility:
public

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