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  1. #include <stdio.h>
  2. #include <string.h>
  3.  
  4. int main(void) {
  5. char a[100], b[10] = "abcdefghi";
  6.  
  7. //memset(a, ' ', sizeof a - 1);
  8. //a[sizeof a - 1] = 0;
  9. memset(a, ' ', sizeof a);
  10. memcpy(a, b, strlen(b));
  11. printf("a is [%.99s]\n", a);
  12. return 0;
  13. }
Success #stdin #stdout 0.02s 1720KB
stdin
Standard input is empty
stdout
a is [abcdefghi                                                                                          ]