Python调用c++可执行程序

Posted 2020-08-17 xiaoniu-666

1、c++编译程序

#include <iostream>  
using namespace std;  
int test()  
{  
    int a = 10, b = 5;  
    return a+b;  
}  
int main()  
{  
    cout<<"---begin---"<<endl;  
    int num = test();  
    cout<<"num="<<num<<endl;  
    cout<<"---end---"<<endl;  
}

g++ -o main_run main.cpp 

 

2、python3调用c++可执行文件

# python3
import subprocess 
import os  

main = "./main_run"  
if os.path.exists(main):  
    rc, out = subprocess.getstatusoutput(main)  
    print(‘rc = %d, \nout = %s‘ % (rc, out) ) 
  
print( ‘*‘*10 )
f = os.popen(main)    
data = f.readlines()    
f.close()    
print(data )
  
print( ‘*‘*10 ) 

os.system(main)

命令结果：

c_py$ python3 -u py_call_c.py 

rc = 0, 
out = ---begin---
num=15
---end---
**********
[‘---begin---\n‘, ‘num=15\n‘, ‘---end---\n‘]
**********
---begin---
num=15
---end---