c++ 文件读写 core dump

#include<iostream>
#include<string.h>
#include<cstdio>
int main()
{
    char path[]="~/tmp.txt";
    FILE* fp=fopen(path,"at");
    fputs("success\n",fp);
    fclose(fp);
    std::cout<<"success"<<std::endl;
    return 0;
}

这段代码运行出错，因为c不能识别“~”，要补全绝对路径！！！