c do{}while(0)

1 goto

bool foo(){
int *p = (int*)malloc(5*sizeof(int));
bool bOk = true;
//执行并处理错误
if(!fun1()) goto errorlable;
if(!fun2()) goto errorlable;
if(!fun3()) goto errorlable;
//......
//执行成功，释放资源并返回ture
free(p);
p = NULL;
return true;
//冗余部分的，错误返回代码
errorlable：
free(p);
p = NULL;
return false;

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作者：axushilong
来源：CSDN
原文：https://blog.csdn.net/axushilong/article/details/79651074
版权声明：本文为博主原创文章，转载请附上博文链接！

2.代替goto

bool foo(){
//分配资源
int *p = (int*)malloc(5*sizeof(int));
bool bOk = true;
//执行并处理错误
do{
bOk = fun1();
if(!bOk)break;
bOk = fun2();
if(!bOk)break;
bOk = fun3();
if(!bOk)break;
//......
}while(0);

//释放资源并返回bOk
free(p);
p = NULL;
return bOk;
}