Threaded Mode | Linear Mode

codecaine · 07-24-2010, 05:41 PM

Code:

#include <stdio.h>

void my_int_func(int x)

{

    printf( "%d\n", x );

}

int main()

{

    void (*foo)(int);

    foo = &my_int_func;

    /* call my_int_func (note that you do not need to write (*foo)(2) ) */

    foo( 2 );

    /* but if you want to, you may */

    (*foo)( 2 );

    return 0;

}

***drdebcol*** · 07-24-2010, 07:47 PM

Very good example. Here is my example with 4 basic mathematical operations. It is an example of array of operations :

Code:

#include <stdio.h>

#include <stdlib.h>

double addition(double a, double b);

double substraction(double a, double b);

double multiplication(double a, double b);

double division(double a, double b);

double (*operation[4])(double a,double b);

int main()

{

  operation[0]=&addition;

  operation[1]=&substraction;

  operation[2]=&multiplication;

  operation[3]=&division;

  double m,n;  

  int op;

  printf("Enter two numbers : \n");

  scanf("%lf %lf",&m,&n);

  printf("Enter operation :  \n1 + \n2 - \n3 * \n4 / \n");

  scanf("%d",&op);

  printf("Solution is : %5.2lf ",(*operation[op-1])(m,n));

  system("pause");    

}

double addition(double a, double b)

{

  return (a+b);       

}

double substraction(double a, double b)

{

  return (a-b);       

}

double multiplication(double a, double b)

{

  return (a*b);       

}

double division(double a, double b)

{

  return (a/b);       

}

***Back_track*** · 07-25-2010, 06:12 AM

Very good, both of you. I learned quite a bit reading this.

codecaine · 07-25-2010, 02:00 PM

Very nice example!

(07-24-2010 07:47 PM)drdebcol Wrote: Very good example. Here is my example with 4 basic mathematical operations. It is an example of array of operations :

Code:

#include <stdio.h> #include <stdlib.h> double addition(double a, double b); double substraction(double a, double b); double multiplication(double a, double b); double division(double a, double b); double (*operation[4])(double a,double b); int main() { operation[0]=&addition; operation[1]=&substraction; operation[2]=&multiplication; operation[3]=&division; double m,n; int op; printf("Enter two numbers : \n"); scanf("%lf %lf",&m,&n); printf("Enter operation : \n1 + \n2 - \n3 * \n4 / \n"); scanf("%d",&op); printf("Solution is : %5.2lf ",(*operation[op-1])(m,n)); system("pause"); } double addition(double a, double b) { return (a+b); } double substraction(double a, double b) { return (a-b); } double multiplication(double a, double b) { return (a*b); } double division(double a, double b) { return (a/b); }