text: #include "3-calc.h"
  #include <stdlib.h>
  /**
   *op_add - add a & b.
   *@a: integer value.
   *@b: integer value.
   *
   *Return: sum of a & b.
   */
  int op_add(int a, int b)
  {
  	return (a + b);
  }
  /**
  *op_sub - subtraction a & b.
  *@a: integer value.
  *@b: integer value.
  *
  *Return: subtraction result of a & b.
  */
  int op_sub(int a, int b)
  {
  	return (a - b);
  }
  /**
  *op_mul - multiplication a & b.
  *@a: integer value.
  *@b: integer value.
  *
  *Return: multiplication result of a & b.
  */
  int op_mul(int a, int b)
  {
  	return (a * b);
  }
  /**
  *op_div - division a & b.
  *@a: integer value.
  *@b: integer value.
  *
  *Return: divided result of a & b.
  */
  int op_div(int a, int b)
  {
  	if (!b)
  	{
  		printf("Error\n");
  		exit(100);
  	}
  	return (a / b);
  }
  /**
  *op_mod -modulo of a & b.
  *@a: integer value.
  *@b: integer value.
  *
  *Return: mod result of a & b.
  */
  int op_mod(int a, int b)
  {
  	if (!b)
  	{
  		printf("Error\n");
  		exit(100);
  	}
  	return (a % b);
  }
  
  