passing struct member to function

I don't know what else to do. For hours I've been trying - but no luck.

Here is the problem:

Code:

---

typedef int (*fnptr)(double, double);

...

struct abc
{
    char check1[3], check2[3], check3[3];
    ...
    fnptr func1, func2, func3;
}mystruct;

...

int foo1(double t1, double t2) { ... }

...

void myfunc(const char a[], fnptr ptr)
{
    if(strcmp(a, "foo")
        ptr = func1; // gcc error: assignment from incompatible pointer types
    ....
}

...

int main()
{
    ...
    myfunc(mystruct.check1,  &mystruct.func1);
    ....
    return 0;
}

---

What am I doing wrong? How can I pass the two struct members (check1, func1) to the function myfunc()? I must pass the function pointer 'func1' by reference.

Thank you for your help.

Is this what you want:

Code:

---

#include <stdio.h>
#include <string.h>

typedef int (*fnptr) (double, double);

struct abc
{
    char    check1[30], check2[30], check3[30];
    fnptr  func1, func2, func3;
} mystruct;

int foo1(double t1, double t2)
{
    printf("%f %f\n", t1, t2);
    return(1);
};

int foo_default(double t1, double t2)
{
    printf("Default function: %f %f\n", t1, t2);
    return(1);
};

void myfunc(const char a[], fnptr *ptr)
{
    *ptr = foo_default;
    if (strcmp(a, "foo") == 0) *ptr = foo1;
}

int main(void)
{
    strcpy(mystruct.check1, "foo");
    myfunc(mystruct.check1, &mystruct.func1);
    mystruct.func1(1.0, 2.0);
    strcpy(mystruct.check1, "notfoo");
    myfunc(mystruct.check1, &mystruct.func1);
    mystruct.func1(1.0, 2.0);
    return(0);
}

/*
Output:
1.000000 2.000000
Default function: 1.000000 2.000000
*/

---

Thank you very much for your help. Now it's working. I forgot to change the parameter types of the functions I wanted to point to from float to double.
But your efforts were not in vain. You helped me to avoid another pitfall with this line:

*ptr = foo_default;

It would have been quite a mess, had I forgotten to initialize this ptr just in case non of the if ... else if were true. Thanks again. :)