Creating your own data type in C

main.c

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

typedef struct Point {
    double x;
    double y;
} Point;

int main(int argc, char* argv[]) {
    Point p = {
        .x = 0.25,
        .y = 0.78
    };
    
    printf("%lf %lf\n", p.x, p.y);
    
    return 0;
}