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  1. import java.lang.*;
  2.  
  3. class Program {
  4. 	public static void main (String[] args) {
  5. 		System.out.println(PegaPrimirosDigitos(12345678, 4));
  6. 		System.out.println(PegaPrimirosDigitos(-12345678, 4));
  7. 		System.out.println(PegaPrimirosDigitos(123, 4));
  8. 		System.out.println(PegaPrimirosDigitos(-12, 4));
  9. 		System.out.println(PegaPrimirosDigitos(0, 0));
  10. 	}
  11. 	public static int PegaPrimirosDigitos(int valor, int digitos) {
  12. 		digitos = Math.max(1, digitos);
  13. 		int positivo = Math.abs(valor);
  14. 		int tamanho = (int)(Math.log10(positivo) + 1);
  15.         if(digitos > tamanho) {
  16.             return valor;
  17.         }
  18. 		return valor / (int)Math.pow(10, tamanho - digitos);
  19. 	}
  20. }
  21.  
  22. //https://pt.stackoverflow.com/q/53055/101
Success #stdin #stdout 0.07s 32464KB
comments (?)
stdin 
Standard input is empty
stdout 
1234
-1234
123
-12
0
https://ideone.com/U0q8EP
language:
Java (12.0.1)
created:
4 years ago
visibility:
public

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