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  1. #include <stdio.h>
  2.  
  3.  
  4. int palindromo(int n) {
  5.   if (n == 0)
  6.     return 1;
  7.   if (n < 0)
  8.     n = -n;
  9.   int p = 0;
  10.   while (n > p) {
  11.     p = (10 * p) + (n % 10);
  12.     if (n == p || (n /= 10) == p)
  13.       return 1;
  14.   }
  15.   return 0;
  16. }
  17. int main(void) {
  18.   int v[10] = {0, 1, 5, 11, 58023, 12021, 1221, 18, 1234321, 9229 };
  19.   for (int i = 0; i < 10; i++) {
  20.     printf("%8d = %s\n", v[i], palindromo(v[i]) ? "sim" : "nao");
  21.   }
  22.  
  23.   return 0;
  24. }
  25.  
Success #stdin #stdout 0s 5476KB
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stdin
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Standard input is empty
stdout
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       0 = sim
       1 = sim
       5 = sim
      11 = sim
   58023 = nao
   12021 = sim
    1221 = sim
      18 = nao
 1234321 = sim
    9229 = sim
https://ideone.com/IrjGH8
language:
C (gcc 8.3)
created:
3 years ago
visibility:
secret

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