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  1. #include<stdio.h>
  2.  
  3. void swap_a(int a,int b){
  4.     int tmp;
  5.     tmp = a;
  6.     a = b;
  7.     b = tmp;
  8. }
  9.  
  10. void swap_b(int*a,int*b){
  11.     int tmp;
  12.     tmp =*a;
  13.     *a = *b;
  14.     *b = tmp;
  15. }
  16.  
  17. void swap_c(int*a,int*b){
  18.     int *tmp;
  19.     tmp = a;
  20.     a = b;
  21.     b = tmp;
  22. }
  23.  
  24. void swap_print(int a,int b){
  25.     printf("a = %d,b = %d\n",a,b);
  26. }
  27.  
  28. int main(){
  29.     int a,b;
  30.  
  31.     a = 100; b = 200;
  32.     swap_print(a,b);
  33.  
  34.     printf("値渡しで関数に引数を受け渡した場合,");
  35.     swap_a(a,b);
  36.     swap_print(a,b);
  37.  
  38.     printf("参照渡しで関数に引数を受け渡した場合ー１,");
  39.     swap_b(&a,&b);
  40.     swap_print(a,b);
  41.  
  42.     printf("参照渡しで関数に引数を受け渡した場合ー２,");
  43.     swap_c(&a,&b);
  44.     swap_print(a,b);
  45.  
  46.     return(0);
  47. }
  48.  
Success #stdin #stdout 0.02s 1676KB
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stdin
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Standard input is empty
stdout
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a = 100,b = 200
値渡しで関数に引数を受け渡した場合,a = 100,b = 200
参照渡しで関数に引数を受け渡した場合ー１,a = 200,b = 100
参照渡しで関数に引数を受け渡した場合ー２,a = 200,b = 100
https://ideone.com/rtu1Iv
language:
C (gcc 8.3)
created:
11 years ago
visibility:
public

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