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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <string.h>
  4.  
  5. int main()
  6. {
  7.     char *cp_0 = "asd";
  8.     char *cp_1 = "123";
  9.     char *cp_2 = "zxc";
  10.     char *cp_3 = "qaz";
  11.     char *cp_4 = "wsx";
  12.     char **cp;
  13.     char **temp;
  14.     int i;
  15.  
  16.     // 最初
  17.     cp = (char **) malloc(3 * sizeof(char *));
  18.     cp[0] = cp_0;
  19.     cp[1] = cp_1;
  20.     cp[2] = cp_2;
  21.  
  22.     // 2個増える
  23.     temp = (char **) malloc((3 + 2) * sizeof(char *));
  24.     memcpy(temp, cp, 3 * sizeof(char *));
  25.     free(cp);
  26.     cp = temp;
  27.     cp[3] = cp_3;
  28.     cp[4] = cp_4;
  29.  
  30.     // 表示
  31.     for (i = 0; i < 5; i++) {
  32.         printf("%d %s\n", i, cp[i]);
  33.     }
  34.  
  35.     // 解放
  36.     free(cp);
  37.  
  38.     // 終了
  39.     return 0;
  40. }
  41.  
Success #stdin #stdout 0.01s 1808KB
comments (?)
stdin 
Standard input is empty
stdout 
0 asd
1 123
2 zxc
3 qaz
4 wsx
https://ideone.com/D4sWTm
language:
C (gcc 8.3)
created:
11 years ago
visibility:
secret

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