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  1. #include <stdio.h>
  2.  
  3.     size_t strcpylen(char *dest, const char *src) {
  4.     	const char *s = src;
  5.         while ((*dest++ = *s++))
  6.             ;
  7.         return s - src - 1;
  8.     }
  9.  
  10. int main(void) {
  11. 	char buf[20];
  12. 	size_t len = strcpylen(buf, "hello");
  13. 	printf("%d '%s'\n", (int)len, buf);
  14. 	return 0;
  15. }
  16.  
Success #stdin #stdout 0s 5320KB
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stdin
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Standard input is empty
stdout
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5 'hello'
https://ideone.com/pN9EDA
language:
C99 (gcc 8.3)
created:
5 hours ago
visibility:
public

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