Question

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我应该将函数randint调用到我的main函数，但由于某种原因它不起作用。我有3个文件：randint.cpp，randint.h和main.cpp。我应该从randint.cpp调用该函数。我不确定我是否应该在头文件中声明该函数并在cpp文件中写入定义。

的main.cpp

#include "std_lab_facilities_5.h"
#include "randint.cpp"
#include "randint.h"
int main()
try {

    int x = randint();
    cout << x;

    return 0;
}


catch (exception& e) {
    cerr << "error: " <<e.what() << '\n';
    return 1;
    }
    catch (...) {
        cerr << "Oops: unknown exception!\n";
        return 2;
    }

randint.cpp

#include "randint.h"
#include <chrono>
using namespace std::chrono;

//linear congruential pseudorandom number generator

int randint() {
    //use the clock for an initial pseudorandom number
    static long x = time_point_cast<microseconds>(system_clock::now()).time_since_epoch().count();
    //calculate the next pseudorandom number
    // parameters from glibc(?)
    x = (((1103515245L * int (x)) & 0x7fffffff) + 12345)& 0x7fffffff;
    return x;
}

randint.h

int randint();

Answer 1

在您想要的类中的.H文件中

public:
int randint();

并且.CPP中要调用所需的函数：

        randint randint; //<--- Telling the class in this case main that randint exists(second randint can be whatever name you prefer)

       randint.randint(); //<--- Here you call the function

我还建议您在创建新文件时使用类向导。

链接2个cpp文件

1 个答案: