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#include <stdio.h>
#include <setjmp.h>
jmp_buf mark;
int i=0;
void c() {
printf( "c in\n");
if (1==i%2) longjmp( mark, i );
printf( "c out\n");
}
void b() {
printf( "b in\n");
c();
printf( "b out\n");
}
void a() {
printf( "a in\n");
b();
printf( "a out\n");
}
void main( void )
{
int jmpret;
jmpret = setjmp( mark );
printf( "Start %d\n",jmpret);
if( jmpret == 0 ) {
printf( "First\n");
a();
i++;
a();
} else {
printf( "Second\n");
}
}
//Start 0
//First
//a in
//b in
//c in
//c out
//b out
//a out
//a in
//b in
//c in
//Start 1
//Second
//
#include <iostream>
using namespace std;
struct MyStruct {
int Nodedata;
MyStruct *pLeft;
MyStruct *pRight;
} s1,s2,s3,s4,s5,s6,s7,s8;
void ashow(MyStruct * p) {
if (p != nullptr) {
ashow(p->pLeft);
ashow(p->pRight);
cout << p->Nodedata << endl;
if (p->Nodedata == 4) {
throw 1;//退出递归.直接返回.
}
}
}
int main() {
MyStruct *pRoot;//根
pRoot = &s1;
s1.Nodedata = 1;
s2.Nodedata = 2;
s3.Nodedata = 3;
s4.Nodedata = 4;
s5.Nodedata = 5;
s6.Nodedata = 6;
s7.Nodedata = 7;
s8.Nodedata = 8;
s1.pLeft = &s2;
s1.pRight = &s3;
s2.pLeft = &s4;
s2.pRight = &s5;
s3.pLeft = &s6;
s3.pRight = &s7;
try {
ashow(pRoot);
} catch (int err) {
cout<<"catch err "<<err<<endl;
}
return 0;
}
//4
//catch err 1
//