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  1. #include <stdio.h>
  2.  
  3. void cat_data(int *data1, const int *data2, int len2){
  4.     int i = 0, j;
  5.     while(data1[i] != NULL){
  6.         i++;
  7.     }
  8.     for(j=0;j<len2;j++){
  9.         *(data1+(i+j)) = data2[j];
  10.     }
  11. }
  12.  
  13. int main()
  14. {
  15.     int data1[7], data2[5], i, a;
  16.     a=5;//data1[]に入れる最大の値
  17.     for(i=0;i<7;i++){
  18.         if(i<a){
  19.             data1[i] = i + 1;
  20.         }
  21.         else{
  22.             data2[i-a] = i + 1;
  23.         }
  24.     }
  25.     int len2 = sizeof(data2) / sizeof(data2[0]);
  26.  
  27.     printf("before:\n");
  28.  
  29.     for(i=0;i<7;i++){
  30.         if(i<a){
  31.             printf("data1[%d] = %d\n",i,data1[i]);
  32.         }
  33.         else{
  34.             printf("data2[%d] = %d\n",i-a,data2[i-a]);
  35.         }
  36.     }
  37.  
  38.     printf("len2 = %d\n",len2);
  39.  
  40.     cat_data(data1, data2, len2);
  41.  
  42.     printf("after:\n");
  43.  
  44.     for(i=0;i<7;i++){
  45.         printf("data1[%d] = %d\n",i,data1[i]);
  46.     }
  47.  
  48.     return 0;
  49. }
Success #stdin #stdout 0s 5292KB
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stdin
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Standard input is empty
stdout
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before:
data1[0] = 1
data1[1] = 2
data1[2] = 3
data1[3] = 4
data1[4] = 5
data2[0] = 6
data2[1] = 7
len2 = 5
after:
data1[0] = 1
data1[1] = 2
data1[2] = 3
data1[3] = 4
data1[4] = 5
data1[5] = 6
data1[6] = 7
https://ideone.com/wARMLO
language:
C (gcc 8.3)
created:
11 hours ago
visibility:
public

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