C语言中执行python代码或源程序文件(高级嵌入方式)

环境：Fedora12 + Python2.6 + C

1. 建立python源代码文件(del.py)：

#!/usr/bin/env python

def calculate(expression):
	try:
		result = eval(expression)
	except:
		print("Eval Error!")
		return None
	return result

if __name__ == "__main__":
	f = open("aa.log", "w")
	f.write("Hello world\n")
	f.close()
	print("what can I do for you")
	expression = "2^(4+2)"
	result = calculate(expression)
	print(result)

2. 建立C源程序(a.c)：

/*
	功能：C程序中执行python代码或python源程序文件
*/
#include 

int main()
{
	int n = 0;
	char fname[] = "del.py";
	FILE *fp = fopen(fname, "r");					// 打开python源码文件
	if(fp == NULL)
	{
		perror("fopen");
		return 1;
	}

	Py_Initialize();								// 初始化python解释器

	n = PyRun_SimpleString("print(eval('2*6'))");	// 执行python代码
	printf("1. n = %d\n\n", n);

	n = PyRun_SimpleFile(fp, fname);				// 执行python文件
	printf("2. n = %d\n\n", n);

	Py_Finalize();

	fclose(fp);

	return 0;
}

3. 编写makefile文件

CC=gcc
CFLAGS=-g
BIN=a

$(BIN): $(BIN).c
	$(CC) $(CFLAGS) -o $(BIN) $(BIN).c -I/usr/include/python2.6 -lpython2.6

clean:
	rm -f *.o $(BIN)

4. 编译运行

[zcm@t #87]$ls
a.c  del.py  makefile  socket
[zcm@t #88]$make
gcc -g -o a a.c -I/usr/include/python2.6 -lpython2.6
[zcm@t #89]$./a
12
1. n = 0

what can I do for you
4
2. n = 0

[zcm@t #90]$ls
a  aa.log  a.c  del.py  makefile  socket
[zcm@t #91]$cat aa.log
Hello world
[zcm@t #92]$

说明：这个代码演示的是python代码高级嵌入方式！