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  1. #include<stdio.h>
  2. int main(){
  3. int a = 1;
  4. char *ptr;
  5. ptr = (char*)&a;
  6. printf("%d\n",*ptr);
  7. if(*ptr){
  8. printf("little endian\n");
  9. }
  10. else{
  11. printf("big endian");
  12. }
  13. }
Success #stdin #stdout 0s 5284KB
stdin
123
stdout
1
little endian