calloc

hi.cpp

#include <stdio.h>
#include <stdlib.h>
// to make chart[100][1000] in function
void main()
{
	int **chart = (int**)calloc(100, sizeof(int*));
	for (int i = 0; i < 100; i++) {
		chart[i] = (int*)calloc(1000, sizeof(int));
	}

	for (int i = 0; i < 100; i++) {
		for (int j = 0; j < 1000; j++) {
			chart[i][j] = i*j;
		}
	}
}