C和C++动态内存的使用

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


int main()
{
    char *p = (char *)malloc(sizeof(char)*100);
    if(p==NULL)
    {
        printf("malloc error\n");
        return;
    }
    strcpy(p,"hello");
    printf("str=%s\n",p);
    free(p);
    p=NULL;
}

//C++
#include <iostream>
#include <cstring>
using namespace std;

int main()
{
    char *p = new char[100];
    strcpy(p,"hello");
    cout << "str=" << p << endl;
    delete []p;
    return 0;
}