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  1. #include<stdio.h>
  2. #include<math.h>
  3.  
  4. int main(void)
  5. {
  6. float num;
  7. printf("Digite um número: \n");
  8. scanf("%f",&num);
  9.  
  10. if(num>0)
  11. printf("%f\n",sqrt(num));
  12. else
  13. printf("%f\n",pow(num,2));
  14.  
  15. return 0;
  16. }
Success #stdin #stdout 0.01s 5272KB
stdin
Standard input is empty
stdout
Digite um número: 
0.000000