C / C++ / MFC

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <conio.h>
#define MAX 41

 int t, i, v1, v2;
 int top = -1;
 char seq[40];
 char rpn[40];
 char fin[40];
int main()
{
  printf("introduce the numbers and opreands in rpn \n");
 fgets(seq,40,stdin);

 t=strlen(seq);

 for (i=0;i<=t;i++)
 if (isdigit(seq[i]))
 {
     Push(rpn, seq[i]);
 }
 if (ispunct(seq[i]));

    v1=pop(rpn);
    v2=pop(rpn);

    if (seq[i] = '+');
        push(fin, v1+v2);
    if (seq[i] = '-');
        push(fin, v1-v2);
    if (seq[i] = '*');
        push(fin, v1*v2);
    if (seq[i] = '/');
        push(fin, v1/v2);

printf(fin);
}

int isempty() {

   if(top == -1)
      return 1;
   else
      return 0;
}

int isfull() {

   if(top == MAX)
      return 1;
   else
      return 0;
}

int peek() {
   return seq[top];
}


int pop() {
   int data;

   if(!isempty()) {
      data = seq[top];
      top = top - 1;
      return data;
   }else {
      printf("Could not retrieve data, Stack is empty.\n");
   }
}

int push(int data) {

   if(!isfull()) {
      top = top + 1;
      seq[top] = data;
   }else {
      printf("Could not insert data, Stack is full.\n");
   }
}

Push(rpn, seq[i]);

Member 12529159 wrote:

This is something a partner gave...

Member 12529159 wrote:

There are, I think, some big mistakes

Joe Smith IX wrote:

I initialized it as NULL and expected it to change when passed to CallDlg. But it stays as NULL before and after the call, therefore creating new modeless CMyDlg everytime it gets called (instead of bringing up the existing one the foreground).

if(pDlg) pDlg->SetForegroundWindow();

if(pDlg)
    pDlg->SetForegroundWindow();

void CMyApp::CallDlg(int nType, CMyDlg & * pDlg)
void CMyApp::CallDlg(int nType, CMyDlg * & pDlg)
{
 //...
}

void CMyApp::CallDlg(int nType, CMyDlg* &pDlg) 
{
  // ... 
}

Member 10964099 wrote:

why is this happening ?

char * s =(char*)malloc(10); // here s points to the freshly allocated memory buffer

s="test" // here s points to the memory containing the string literal

printf("%s\n", final);

fflush(stdout);