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  1. #include <stdlib.h>
  2. #include <stdint.h>
  3. #include <string.h>
  4.  
  5. int main() {
  6.  
  7.     // Buffer.
  8.     unsigned char buffer[sizeof(int) + sizeof(int) + sizeof(float)];
  9.  
  10.     // Buffer pointer (first object).
  11.     unsigned char *buf_ptr = buffer;
  12.  
  13.     // Variables ressources.
  14.     int a = 65500;
  15.     int b = 32000;
  16.     float c = 3.14;
  17.  
  18.     // Variables pointers.
  19.     int *aa = NULL;
  20.     int *bb = NULL;
  21.     float *cc = NULL;
  22.  
  23.     /* Copy variables to buffer. */
  24.     uint16_t cur = 0;
  25.     memcpy(buf_ptr + cur, &a, sizeof(int));
  26.     cur += sizeof(int);
  27.     memcpy(buf_ptr + cur, &b, sizeof(int));
  28.     cur += sizeof(int);
  29.     memcpy(buf_ptr + cur, &c, sizeof(float));
  30.     cur += sizeof(float);
  31.  
  32.     /* Set pointers. */
  33.     cur = 0;
  34.     aa = (int*)(buf_ptr + cur);
  35.     cur += sizeof(int);
  36.     bb = (int*)(buf_ptr + cur);
  37.     cur += sizeof(int);    
  38.     cc = (float*)(buf_ptr + cur);
  39.     cur += sizeof(float);
  40.  
  41.     // Print values.
  42.     printf("%i %i %f\n", *aa, *bb, *cc);
  43.  
  44.     return 0;
  45. }
Success #stdin #stdout 0s 2156KB
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stdin
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Standard input is empty
stdout
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65500 32000 3.140000
https://ideone.com/64awsM
language:
C (gcc 8.3)
created:
10 years ago
visibility:
public

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