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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <string.h>
  4. char *substring(char *str, char *buf, int start, int end) {
  5.     for (int i = start; i < end; i++)
  6.         buf[i] = str[i];
  7.     return buf;
  8. }
  9.  
  10. int main() {
  11. 	char *texto = malloc(6);
  12.     if (strncmp(substring("Hello World", texto, 0, 5), "Hello", 5) == 0)
  13.         printf("yep");
  14.     free(texto);
  15.     return 0;
  16. }
Success #stdin #stdout 0s 2288KB
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stdin
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Standard input is empty
stdout
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yep
https://ideone.com/zYCK9Q
language:
C99 (gcc 8.3)
created:
8 years ago
visibility:
public

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