python-调用C库，python-调用c,$ cat myte
python-调用C库，python-调用c,$ cat myte
$ cat mytestlib.c#include <stdio.h> #include <stdlib.h> int subPrint(int a, int b){ printf("%d - %d = %d \n", a, b,a-b); return a-b; }gcc -g -o libpycall_c.so -shared -fPIC mytestlib.c>>> import ctypes >>> lib = ctypes.CDLL("./libpycall_c.so") >>> lib.subPrint(12, 34)12 - 34 = -22 -22$ cat mytestlib.cpp#include <iostream>using namespace std;int subPrint_(int a, int b){ int c; c=a-b; cout <<a << "-" << b <<"="<< c << endl; return c;}extern "C" { int subPrint(int a, int b){ return subPrint_(a, b); }}>>> import ctypes >>> import ctypes >>> lib = ctypes.CDLL("./libpycall.so") >>> lib.subPrint(15, 3) 15-3=1212
$ cat mytestlib.cpp#include <iostream>//dmyhaspl.github.iousing namespace std;class AccumulationLib{ private: int first=0; int end=0 ; public: void setNumber(int first,int end){ this->first=first; this->end=end; } long accumulate(){ long sum=0; for(int num=first;num<=end;num++){ cout<<num<<" "; sum+=num; } return sum; } int getFirstNumber(){ return first; } int getEndNumber(){ return end; }}; extern "C" { AccumulationLib obj; void setNumber(int first,int end){ obj.setNumber(first,end); } int getFirstNumber(){ return obj.getFirstNumber(); } int getEndNumber(){ return obj.getEndNumber(); } long accumulate(){ return obj.accumulate(); }}>>> import ctypes>>> lib = ctypes.CDLL("./libpycall.so")>>> lib.setNumber(12,32)43364592>>> lib.accumulate()12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 462>>> print lib.accumulate()12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 462>>> lib.setNumber(12,22)43364592>>> print lib.accumulate()12 13 14 15 16 17 18 19 20 21 22 187
python-调用C库
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