In C, using a pointer to a struct to call a function

In C, using a pointer to a struct to call a function pointed to inside the struct leads to seg fault

This causes a seg fault:


int nada(int input){
    printf("value = %d", input);
}

typedef struct foo{
    void (*funcptr)(int);
}foo;

main()
{
    foo* FOO;
    FOO->funcptr = nada;

    FOO->funcptr(5);
}

SOLUTION:


#include <stdio.h>

int nada(int input){
    printf("value = %d", input);
}

typedef struct foo{
    int (*funcptr)(int input);
} foo;

main()
{
    foo Foo;
    Foo.funcptr = nada;
    Foo.funcptr(5);
}
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