C语言基础编程求解答

#include
int main()
{
    int dengji,shuliang;
    scanf("%d %d",&dengji,&shuliang);
    switch(dengji)
    {
        case 1:ptintf("%.2lf",5.50*shuliang);break;
        case 2:ptintf("%.2lf",4.30*shuliang);break;
        case 3:ptintf("%.2lf",3.00*shuliang);break;
        case 4:ptintf("%.2lf",2.50*shuliang);break;
        default:printf(:Data Error!);break;
    }
    return 0;
}

错在哪里了
求解答

printf写错了，printf(:Data Error!) 没引号呀

 
#include<stdio.h>
int main()
{
    int dengji,shuliang;
    scanf("%d %d",&dengji,&shuliang);
    switch(dengji)
    {
        case 1:printf("%.2lf",5.50*shuliang);break;
        case 2:printf("%.2lf",4.30*shuliang);break;
        case 3:printf("%.2lf",3.00*shuliang);break;
        case 4:printf("%.2lf",2.50*shuliang);break;
        default:printf(":Data Error!");break;
    }
    return 0;
}