linux下c代码调用.so,Linux下C程序调用.so(动态链)的一个例子

/**********************************************

* 使用Linux下C++的动态链接库.So文件

* void *pdlHandle;

* pdlHandle = dlopen("/home/fengsy/len/Len.So/len.so", RTLD_LAZY);

* pnswap=dlsym(pdlHandle, "swap");

*********************************************/

[fengsy@ctihost Len.So]$ cat call.c

#include

#include

#include

#include

void *(*pnswap)(int *,int *);

main()

{

void *pdlHandle;

int a[1],b[1];

a[0]=1;

b[0]=2;

pdlHandle = dlopen("/home/fengsy/len/Len.So/len.so", RTLD_LAZY);

pnswap=dlsym(pdlHandle, "swap");

printf("a:%d  b:%d/n",a[0],b[0]);

pnswap(a,b);

printf("a:%d  b:%d/n",a[0],b[0]);

dlclose(pdlHandle);

}

-------------------------------------------------------------------------[fengsy@ctihost Len.So]$ cat len.cvoid swap(int *a,int *b){        printf("3333333/n");        int c;        c=*b;        *b=*a;        *a=c;}