int suffix_cal(char exp[])
{
stack temp;
stack s;
stack s2;
init_stack(&temp, 100);
init_stack(&s, 100);
init_stack(&s2, 100);
while(*exp != '\0') {
push(&temp, *exp);
exp++;
}
while(stack_length(&temp) != 0)
push(&s, pop(&temp));
while(stack_length(&s) != 0) {
push(&s2, pop(&s));
if(gettop(&s2) == '+' ||gettop(&s2) == '-'||gettop(&s2)=='*'||gettop(&s2) == '/') {
char ch3 = pop(&s2);
char ch2 = pop(&s2);
char ch1 = pop(&s2);
int r = calculate(ch1, ch2, ch3);
char ch = r + 48;
push(&s2, ch);
}
}
return gettop(&s2) - 48;
}
int symbolmatching( const char* str )
{
struct NODE* stack = NULL;
if( 0 != push( &stack, (int)'#' ) )
return -1;
while( '\0' != *str )
{
char ch = 0;
if( 0 != gettop( &stack, (int*)&ch ) )
return -1;
int flag = 0;
switch( *str )
{
case ')':
if( '(' == ch )
flag = 1;
break;
case '}':
if( '{' == ch )
flag = 1;
break;
case ']':
if( '[' == ch )
flag = 1;
break;
}
if( 1 == flag )
{
if( 0 != pop( &stack, (int*)&ch ) )
return -1;
} else {
if( 0 != push( &stack, (int)*str ) )
return -1;
}
++str;
}
char ch = 0;
if( 0 != gettop( &stack, (int*)&ch ) )
return -1;
if( '#' == ch )
{
if( 0 != pop( &stack, (int*)&ch ) )
return -1;
}
return isempty( &stack );
}
bool LuaWrapper::callLuaFunc(const char* szTableName, const char* szFuncName, const char* sig, ...)
{
int nIndexTop = gettop();
va_list vl;
va_start(vl, sig);
bool bRet = true;
if (!loadTable(szTableName))
{
luaL_error(m_luaState, "load table[%s] failed.", szTableName);
bRet = false;
}
lua_pushstring(m_luaState, szFuncName);
lua_gettable(m_luaState, -2);// key从栈弹出，并获取 table[key] 的值压入栈
if (!lua_isfunction(m_luaState, -1))
{
luaL_error(m_luaState, "table [%s] field [ %s ] isn't an function.", szTableName, szFuncName);
bRet = false;
}
else
{
bRet = doCallFunction(sig, vl);
}
va_end(vl);
settop(nIndexTop);
return bRet;
}
int main(){
int type;
double op2;
char s[MAXOP];
while((type = gettop(s)) != EOF){
switch(type){
case NUMBER:
push(atof(s));
break;
case '+':
push(pop() + pop());
break;
case '*':
push(pop() * pop());
break;
case '-':
op2 = pop();
push(pop() - op2);
break;
case '/':
op2 = pop();
push(pop() / op2);
break;
case '\n':
printf("\t%.8g\n", pop());
break;
default:
printf("error: unknown command %s\n", s);
break;
}
}
return 0;
}
packet from_network_layer(void){
packet p;
p=gettop();
dequeue();
next_net_pkt++;
return p;
}
void transform(stack *suffix, char exp[])
{
stack s;
init_stack(&s, 100);
push(&s, '#');
while(*exp != '#') {
if(*exp != '+' && *exp != '-' && *exp != '*' && *exp != '/') {
push(suffix, *exp);
}else if(stack_length(&s) != 0 && priority(*exp) > priority(gettop(&s))){
push(&s, *exp);
}else {
while(stack_length(&s) != 1 && priority(*exp) <= priority(gettop(&s))) {
push(suffix, pop(&s));
}
push(&s, *exp);
}
exp++;
}
while(stack_length(&s) != 0)
push(suffix, pop(&s));
}
main(stackstru *p)
{
int n,i,k,h,x1,x2,select;
printf("create a empty stack!\n");
init(p);
printf("input a stack length:\n");
scanf("%d",&n);
for(i=0; i<n; i++)
{
printf("input a stack value:\n");
scanf("%d",&k);
push(p,k);
}
printf("select 1:display()\n");
printf("select 2:push()\n");
printf("select 3:pop()\n");
printf("select 4:gettop()\n");
printf("input a your select(1-4):\n");
scanf("%d",&select);
switch(select)
{
case 1:
{
display(p);
break;
}
case 2:
{
printf("input a push a value:\n");
scanf("%d",&h);
push(p,h);
display(p);
break;
}
case 3:
{
x1=pop(p);
printf("x1->%d\n",x1);
display(p);
break;
}
case 4:
{
x2=gettop(p);
printf("x2->%d",x2);
break;
}
}
}
int main(int argc,char* argv[])
{
stack s;
char* left= "([{";
char* right= ")]}";
char ch,ch_prior;
bool flag = true;
stack_init(&s);
while(true)
{
ch=getchar();
if(ch =='\n')
break;
if(isin(ch,left))
push(&s,&ch);
else if(isin(ch,right))
{
if(gettop(&s,&ch_prior)&&match(ch_prior,ch))
pop(&s,&ch);
else
{
flag=false;
break;
}
}
}
if(!stackempty)
flag = false;
if (flag==true)
puts("yes");
else
puts("no");
return 0;
}
int main( void ){
int type;
double operand;
char expression[MAX_POLISH_SIZE];
// instruction
printf("use ~ to represent sin operation.\n");
printf("use # to represent exp operation.\n");
printf("use @ to represent power operation.\n");
while((type=gettop(expression)) != EOF){
switch(type){
case NUMBER:
{ push(atof(expression)); break;}
case '+':
{ push(pop() + pop()); break;}
case '*':
{ push(pop() * pop()); break;}
case '-':
{ swaptop2(); push(pop() - pop()); break;}
case '/':
{ operand = peek(); swaptop2(); assert(operand != 0); push(pop() / pop()); break;}
case '%':
{ operand = peek(); swaptop2(); assert(operand != 0); push(mod(pop(), operand)); break;}
case '~': // sin
{ push(sin(pop())); break;}
case '#': // exp
{ push(exp(pop())); break;}
case '@': // power
{ operand = peek(); swaptop2(); push(pow(pop(), operand)); break;}
case '\n':
{ printf("\t%.8g\n", pop()); break;}
default:
{ printf("error happens.\n"); break;}
}
}
return 0;
}
/*--------------------------------------------------------------*/
void main()
{
int a;
s s1;
clrscr();
settop(&s1);
push(&s1,a);
push(&s1,a);
push(&s1,a);
push(&s1,a);
push(&s1,a);
display(&s1);
pop(&s1);
pop(&s1);
pop(&s1);
display(&s1);
push(&s1,a);
gettop(&s1);
display(&s1);
getch();
}
int main(void)
{
char result,n;
char *inputc;
char buf[64];
char top_item = '0';
char op1 = '1',op2 = '2',op = '+';
char e='z';
sqstack optr,opnd;
initstack(&optr);
push(&optr,'#');
initstack(&opnd);
printf("请输入表达式\n");
// getchar();
fgets(buf,64,stdin);
inputc = buf;
// printf("input is %s\n",inputc);
while(1)
{
printf("input is %c\n",*inputc);
if( *inputc == '\0' || gettop(&optr,&top_item) == '#')
{
break;
}
if(*inputc <= '9' && *inputc >= '0')
{
push(&opnd,*inputc);
inputc++;
}
else
{
gettop(&optr,&top_item);
// printf("top_item is %c\n",top_item);
e = sign(top_item,*inputc);
// printf("e is %c\n",e);
switch(e)
{
case'<':push(&optr,*(inputc));
inputc++;
break;
case'=':pop(&optr,&op);
inputc++;
break;
case'>':pop(&optr,&op);
pop(&opnd,&op2);
pop(&opnd,&op1);
n = count(op1,op2,op);
push(&opnd,n);
break;
}
}
}
gettop(&opnd,&result);
printf("结果为:%d\n",result - '0');
return 0;
}