pointers to function error

Question

hello guys i'm kinda new in here and in c also i've been practising pointers to functions and i've come up with this code :

 #include <stdio.h>
#include <stdlib.h>
typedef int (*fptr)(int,int);
void swapp(int*,int*);
int sub(int ,int );
int add(int ,int );
int operation(fptr,int,int);
int main()
{
    int n=10,n1=25;
    printf("%d+%d=%d",n,n1,compute(add,n,n1));
    printf("\n%d-%d=%d",(n>n1)?n:n1,(n<n1)?n:n1,compute(sub,n,n1));


    return 0;
}
void swapp(int *a,int *b){
    int temp=*a;
    *a=*b;
    *b=temp;
}
int add(int a,int b){
    return a+b;
}
int sub(int a,int b){
    if(a<b)
    swapp(a,b);
    return a-b;
}
int compute(fptr operation ,int a,int b){

    return operation(a,b);
}

when compiled i get "Segmentation Fault(core duped) can anyone help me debug this? and thx i just can't see anything wrong with the code

Are you saying that the compiler crashed( I doubt that)? Or, you are getting this error when you RUN your program? — OldProgrammer
– OldProgrammer, Commented Dec 6, 2013 at 17:17
error at run time, it's solved the error was the use of swapp in the sub function it's solved now thx guys :) — thrax
– thrax, Commented Dec 6, 2013 at 17:25
Turn on warnings in your compiler ... that would have caught this. And learn how to use your debugger, don't ask SO for help debugging individual programs. — Jim Balter
– Jim Balter, Commented Dec 6, 2013 at 17:54

BLUEPIXY · Accepted Answer · 2013-12-06 17:18:51Z

6

need prototype

int compute(fptr operation ,int a,int b);

and

swapp(a,b);

to

swapp(&a,&b);

answered Dec 6, 2013 at 17:18

BLUEPIXY

40.2k7 gold badges37 silver badges73 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

haccks Over a year ago

If this answer helped you then you would like to accept it. Read about page for more detail.

BLUEPIXY Over a year ago

@haccks I appreciate your kindness

Collectives™ on Stack Overflow

pointers to function error

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related