通过C ++中的字符串获取输入

Question

In C, suppose I need to take input from a string

 int num,cost;
 char *name[10];
 printf("Enter your  inputs [quantity item_of_name at cost]");
 scanf("%d%*c%s%*c%*s%*c%d",&num,name[0],&cost);

 printf("quantity of item: %d",num);
 printf("the cost of item is: %d",cost);
 printf("the name of item is: %d",name[0]);

INPUT

1 book at 12

OUTPUT

Quantity of item is: 1

The cost of item is: 12

The name of item is: book

Now I want to do the same thing in C++. And I have no idea how to approach. gets() returns the whole string.Is there any specific function that I am missing out on? Please help.

Answer 1

int num,cost;
std::string name;
std::cout << "Enter your  inputs [quantity item_of_name at cost]: ";
if (std::cin >> num >> name >> cost)
{ } else 
{ /* error */ }

You will want to add errorhandling

Answer 2

在C ++中，您应该使用标准库中的cin ， cout和string 。

Answer 3

You could use iostream's cin.

int num,cost;
 char *name[10];
 std::cout <<"Enter your quantity"<<std::endl;
 std::cin>> num;
 std::cout<<" Enter the cost"<<std::endl;
 std::cin>>cost;
 std::cout<<"Enter the name"<<std::endl;

 std::cout<<"The quantity of the item is: "<<num<<" costing: "<<cost<<" for "<<name[0]<<std::endl;

and then of course you could also use std::string instead of char*.

Or streamline the cin's as cin >> num >> cost >> name;

Also, as Griwes noted, you will want to perform error checking on your results.

Answer 4

In c++, std::stream provides the read and write communication with the user through the >> operator.

Your code translates to

int num,cost;
std::string name;

std::cout << "Enter your  inputs [quantity item_of_name at cost]" << std::flush;
std::cin >> num >> name;
std::cin >> at; // skip the at word
std::cin >> cost;

std::cout << "quantity of item: " << num << std::endl;
std::cout << "the cost of item is: " << cost << std::endl;
std::cout << "the name of item is: " << name << std::endl;