//carrots.cpp -- food processing program
//uses and displays a variable

#include <iostream>

int main()
{
    using namespace std;

    int carrots

        carrots = 25
        cout << "I have"
        cout << carrots;
        cout << "carrots.";
        cout << endl;
        carrots = carrots - 1;
        cout << "Crunth,crunth. Now I have " << carrots << "carrots." << endl;
            return 0;
}

别人不愿意猜你想问什么，你有什么问题你要说出来。

比如：
只有这样，别人才能知道你想问的是代码的语法错误，才能告诉你解决办法
int carrots
carrots = 25
cout << "I have"
这三句后面缺少分号。

谢谢大佬