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  1. #include <stdio.h>
  2.  
  3. int readInt()
  4. {
  5.   int x;
  6.   while( !scanf("%d",&x) )
  7.   {
  8.   	char c;
  9.     while (( c = getchar()) != '\n' && c != EOF); // limpieza del buffer de entrada
  10.     printf("ERROR: No era un numero. Intentalo de nuevo: ");
  11.   }
  12.  
  13.   return x;
  14. }
  15.  
  16. int main()
  17. {
  18.   puts("Introduzca dos números: ");
  19.   int x = readInt();
  20.   int y = readInt();
  21.  
  22.   int z = x + y;
  23.   printf("Resultado: %d\n",z);
  24. }
Success #stdin #stdout 0s 10320KB
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stdin
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1 2
stdout
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Introduzca dos números: 
Resultado: 3
https://ideone.com/UZT8tW
language:
C (gcc 8.3)
created:
6 years ago
visibility:
public

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