C로 짜는 std::vector<std::vector<int>>

cvector.c

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>

#define CONTAIN_TYPE int

typedef struct {
	int iSize;
	CONTAIN_TYPE *iArr;
}Contain;

typedef struct {
	int iSize;
	Contain* cArr;
}vector;



int main()
{
	vector v;
	v.iSize = 0;
	v.cArr = NULL;

	printf("to use array, input -1\n");

	while (1)
	{
		int iSize = 0;
		// input Arr Size
		scanf("%d", &iSize);
		rewind(stdin);
		if (iSize == -1) goto ShowResult;
		// Create Contain
		Contain newContain;
		newContain.iSize = iSize;
		newContain.iArr = malloc(sizeof(CONTAIN_TYPE) * iSize);
		for (int i = 0; i < iSize; ++i) newContain.iArr[i] = i * 10;

		// Add in vector
		v.iSize++;
		// New cArr
		Contain* Ctemp = malloc(sizeof(Contain) * v.iSize);
		for (int i = 0; i < v.iSize - 1; ++i)
			Ctemp[i] = v.cArr[i];
		Ctemp[v.iSize - 1] = newContain;
		// Release old cArr
		if(v.cArr != NULL)
			free(v.cArr);
		// swap
		v.cArr = Ctemp;
	}

	ShowResult:

	printf("Result : \n");
	for (int i = 0; i < v.iSize; ++i)
	{
		printf("%d : %d\n", i, v.cArr[i].iSize);
	}

	int iSelect = 0;
	printf("Select Show Array : ");
	
	do {
		scanf("%d", &iSelect);
		rewind(stdin);
	} while (iSelect < 0 || iSelect >= v.iSize);

	for (int i = 0; i < v.cArr[iSelect].iSize; ++i)
		printf("	%d \n", v.cArr[iSelect].iArr[i]);
	
}