我在我的Windows7机器上安装了cygwin,而且我正在运行一些c ++代码。当我运行此代码时:
#include <iostream>
#include <string>
#include <fstream>
#include <time.h>
#include <math.h>
#include "Pop.h"
using namespace std;
int main() {
ifstream in;
ofstream out;
cout << "something";
out.open("res7.txt", ios::out|ios::app);
if (out.is_open())
out << "1\n";
else
cout << "unable to open res7 file";
out.close();
int seed = time(NULL);
out.open("res7.txt", ios::out|ios::app);
if (out.is_open())
out << "2\n";
else
cout << "unable to open res7 file";
out.close();
out.open("res7.txt", ios::out|ios::app);
if (out.is_open())
out << "seed " << seed << '\n';
else
cout << "unable to open res7 file";
out.close();
out.open("res7.txt", ios::out|ios::app);
if (out.is_open())
out << "3\n";
else
cout << "unable to open res7 file";
out.close();
srand (seed);
out.open("res7.txt", ios::out|ios::app);
if (out.is_open())
out << "4\n";
else
cout << "unable to open res7 file";
out.close();
double parameters[4];
int location;
in.open("input7.txt", ios::in);
out.open("res7.txt", ios::out|ios::app);
if (out.is_open())
out << "5\n";
else
cout << "unable to open res7 file";
out.close();
return 0;
}
我在控制台上看到一个输出(某物)。但是,当我运行完整的代码时:
#include <iostream>
#include <string>
#include <fstream>
#include <time.h>
#include <math.h>
#include "Pop.h"
using namespace std;
int main() {
ifstream in;
ofstream out;
cout << "something";
out.open("res7.txt", ios::out|ios::app);
if (out.is_open())
out << "1\n";
else
cout << "unable to open res7 file";
out.close();
int seed = time(NULL);
out.open("res7.txt", ios::out|ios::app);
if (out.is_open())
out << "2\n";
else
cout << "unable to open res7 file";
out.close();
out.open("res7.txt", ios::out|ios::app);
if (out.is_open())
out << "seed " << seed << '\n';
else
cout << "unable to open res7 file";
out.close();
out.open("res7.txt", ios::out|ios::app);
if (out.is_open())
out << "3\n";
else
cout << "unable to open res7 file";
out.close();
srand (seed);
out.open("res7.txt", ios::out|ios::app);
if (out.is_open())
out << "4\n";
else
cout << "unable to open res7 file";
out.close();
double parameters[4];
int location;
in.open("input7.txt", ios::in);
out.open("res7.txt", ios::out|ios::app);
if (out.is_open())
out << "5\n";
else
cout << "unable to open res7 file";
out.close();
if (in.is_open()) {
out.open("res7.txt", ios::out|ios::app);
if (out.is_open())
out << "6\n";
else
cout << "unable to open res7 file";
out.close();
char line[256];
while (!in.getline(line, 256).eof()) {
out.open("res7.txt", ios::out|ios::app);
if (out.is_open())
out << "7\n";
else
cout << "unable to open res7 file";
out.close();
char *input = strtok(line, " ");
int i=0;
while (input!=NULL) {
out.open("res7.txt", ios::out|ios::app);
if (out.is_open())
out << "8\n";
else
cout << "unable to open res7 file";
out.close();
parameters[i] = atof(input);
input = strtok(NULL, " ");
i++;
}
int rnum = rand();
location = rnum%10000;
out.open("res7.txt", ios::out|ios::app);
if (out.is_open())
out << "9\n";
else
cout << "unable to open res7 file";
out.close();
Pop p(parameters[0], parameters[1], 0.2, 0.1, parameters[2], location);
out.open("res7.txt", ios::out|ios::app);
if (out.is_open())
out << "10\n";
else
cout << "unable to open res7 file";
out.close();
double L = exp(-parameters[3]);
double FF_mean = p.FF_steady(parameters[3], L, 0.0);
out.open("res7.txt", ios::out|ios::app);
if (out.is_open())
out << "11\n";
else
cout << "unable to open res7 file";
out.close();
out.open("res7.txt", ios::out|ios::app);
if (out.is_open()) {
out << "number of chromosomes is " << p.all_population[0]->ga->chromosome << " alpha is " << parameters[2] << " cost is " << parameters[1];
out << " a is " << parameters[0] << " u is " << parameters[3] << " location is " << location << " FF steady is " << FF_mean << '\n';
}
else
cout << "unable to open res7 file FF";
out.close();
out.open("res7.txt", ios::out|ios::app);
if (out.is_open())
out << "12\n";
else
cout << "unable to open res7 file";
out.close();
if (FF_mean>0.1) {
out.open("res7.txt", ios::out|ios::app);
if (out.is_open())
out << "13\n";
else
cout << "unable to open res7 file";
out.close();
p.insert_O(0.05);
out.open("res7.txt", ios::out|ios::app);
if (out.is_open())
out << "14\n";
else
cout << "unable to open res7 file";
out.close();
double total_mean = p.steady(parameters[3], L, 0.0);
double perc = p.perc_O();
out.open("res7.txt", ios::out|ios::app);
if (out.is_open())
out << "total steady is " << total_mean << " perc O is " << perc << '\n';
else
cout << "unable to open res7 file";
out.close();
}
}
}
else
cout << "Unable to open input7 file\n";
in.close();
return 0;
}
我在控制台上看不到任何输出。当我在另一台机器上运行代码时,我发现我有一个浮点异常。我想我可以找到它的位置,但我不明白为什么我在cygwin中没有看到任何输出或控制台上的错误。任何人都可以帮助我吗?
答案 0 :(得分:0)
您确定代码是否已编译?在第三行到最后一行你有
in.close();*/
但是,没有开放/ *标签。我会确保您的代码实际编译,并且您生成了一个新的.exe。您可能无法编译和运行没有任何cout的旧.exe。
另外,你确定没有抛出异常吗?我无法完全测试代码,因为我错过了“Pop.h”的源代码,因此我无法完全看到编译时出现的错误。你可以尝试在程序的顶部有一个初始cout,也许可以为Pop.h提供帮助,所以我们可以测试它。
答案 1 :(得分:0)
首先,例外情况可能会在没有提供信息的情况下终止程序。 Cygwin试图将windows和unix结合起来,事情并不总是完美无缺。
其次,std::cout
是缓冲流。因此,每个operator<<
添加到缓冲区,直到缓冲区填充并自动输出,您使用cout.flush()
显式刷新缓冲区,或者隐式刷新缓冲区,如std::endl
将导致
因此,您需要使用调试器或其他系统来查找错误并进行修复。您还需要在多个平台上进行测试,因为事情的表现方式不同 - 包括不同的错误,甚至看似工作。