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

typedef int (*fnptr)(int,int);
typedef char (*cptr)(char*,char*);

int add(int a,int b){
    int sum;
    sum=a+b;
    return sum;
}

char chptr(char* a,char* b){
    char c;
    printf("%s",a);
}

int main(){
    fnptr fp;
    fp=&add;
    int r=fp(5,6); //or (*fp)(5,6)
    printf("%d",r);
    
    cptr ch;
    ch=&chptr;
    char c=(*ch)("zh","g");
    printf("%c",c);
}

//imp one about pointers
#include <stdio.h>

typedef int (*fptr)(int*, int*);

int add(int *a,int *b){
    int sum;
    sum = *a+*b;
    return sum;
}

int main(){
    fptr fp;
    int a = 5,b=7;
    fp = &add;
    int out = fp(&a,&b);
    printf("%d",out);
}