为什么脚本Ajax JSON无法绘制JS图表

Question

为什么不使用我的脚本 datatochart.push（data）; 。请帮助我吗？

function function_name（）{             $ .ajax（{                 输入：“ POST”，                 网址：“ / data / api / json.php？cmd = wipline”，                 contentType：“ application / json; charset = utf-8”，                 dataType：“ json”，                 成功：功能（数据）{                     datatochart.push（data）;                 }，                 错误：function（errMsg）{                     警报（errMsg）;                 }             }）;         }         function_name（）;

int main() 
{

    int qid=msgget(IPC_PRIVATE, IPC_EXCL|IPC_CREAT|0600);

    cout<<"\nThe message queue was created succesfully!\n";
    cout<<"\nIts queue ID is "<<qid<<"\n";


    pid_t cpid;

    cpid=fork();

        if(cpid==0)
        {

            cout<<execl("/receiver","receiver",(char *)0);
            cout<<"The receiver child has process ID: "<<getpid()<<"\n";
            exit(0);
        }

        cpid=fork();

        if(cpid==0)
        {

            cout<<execl("/sender","sender",(char *)0);
            cout<<"The sender child has process ID: "<<getpid()<<"\n";
            exit(0);
        }

    while(wait(NULL) != -1);
}