Question

Is there any way to use std::pair and std::make_pair in C? seems that they are applicable in C++.

As I used

#include "utility"

it says it can not find such file

thansk for any suggestion

Answer 1

It’s C++-only. C has no templates, so you will have to roll your own with macros to emulate them to some extent, for example:

#define PAIR_TYPE(type1, type2)\
    typedef struct {\
        type1 first;\
        type2 second;\
    }
#define MAKE_PAIR(val1, val2) {val1, val2}

PAIR_TYPE(int, float) mypair;
mypair p = MAKE_PAIR(1, 12.0);

But it’s really not worth the trouble, result code is more verbose and less obvious than just using plain structs.