c/c++ | 测试 | char[]、string、strlen、sizeof、‘\0‘

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#include 
#include 

using namespace std;


int main()
{
    char ans[1024] = {0};
    char ans_[64] = {"hi, zhangsan"};
    char ans_2[64] = {"my name  is :lisi! how about you !"};
    strcat(ans, ans_);
    sprintf(ans+strlen(ans), "\n%s", ans_2);
    std::cout<