Linux qtcreator动态加载动态链接库案例

#include <iostream> #include <dlfcn.h> using namespace std; typedef int (*pStrLenFun)(char *str); typedef char *(*pStrCopyFun)(char *desc, char *src); int main(int argc, char *argv[]) { char src[]="Hello Dymatic"; char desc[80]; pStrLenFun fun1; pStrCopyFun fun2; void *phandle = NULL; char *perr = NULL; phandle = dlopen("libslstrlen.so", RTLD_LAZY);//RTLD_NOW if(!phandle) { printf("Failed Load library!\n"); } perr = dlerror(); if(perr != NULL) { printf("%s\n",perr); return 0; } fun1 = (pStrLenFun)dlsym(phandle, "StrLen"); perr = dlerror(); if(perr != NULL) { printf("%s\n",perr); return 0; } fun2 = (pStrCopyFun)dlsym(phandle, "StrCopy"); perr = dlerror(); if(perr != NULL) { printf("%s\n",perr); return 0; } printf("The string is: %s\n",src); printf("the string length is: %d\n",fun1(src)); printf("the string copyed:%s\n",fun2(desc,src)); return 0; }