This discussion has been locked.

You can no longer post new replies to this discussion. If you have a question you can start a new discussion

C++ simple question

I am using uVision 4.21 MDK_ARM to learn how to program C++ on MCB1700.

I have create a new project and add 2 files (startup_CPL17xx.s / system_LPCxx.c) to startup group. Then I add main.cpp to Sources Files group. The project options are:

Device: LPC 1768
Target: Default
Output: Default
Listing: Default
User: Default
C++: Default
Asm: Default
Linker: Default
Debug: Use ULINK Cortex Debugger
Utilities: Default

Then I change the startup_LPC17xx.s
Stack Size: 0x0000 1000
Heap Size: 0x0000 1000

My main.cpp code:

#include <vector>
#include <string>

int main (void)
{
  int i = 0;
  int sum = 0;
  std::vector<int> vInt;
  std::string str = "Hello, C++";

  vInt.push_back(1);
  vInt.push_back(2);
  vInt.push_back(3);
  vInt.push_back(4);
  vInt.push_back(5);

  sum = vInt.size();
  sum = 0;
  for(i=0; i<5; i++)
  {
    sum += vInt[i];
  }
  while(1);
  //return 0;
}

I build the project successfully and download it to MCB1700 board "OK". Then I hit "F9" to set break point at line "vInt.push_back(1);". After I select Debug->Start Debug Session, the break point is not reached even I hit "F5" many times. Why?

By the way, I find there are 2 windows: Disassembly Window and Code Window (for main.cpp). How could I step through the code on C++ source code level and how could I step through the code on Assembly level?

Parents

0 ²erik malund over 14 years ago in reply to David Yong

int main (void)
{
        int i = 0;
        int sum = 0;

        for(i=0; i<10; i++) //***********************
        {
                sum = sum + i;
        }
        i = sum;
        while(1);
        //return 0;
}
I can reach the break point. But after I add variables "i" and "sum" to Watch 1 windows and

hit "F10" to step over the code. I can not see the i/sum value (the value show "<out of scope>".

"the break point" is not very informative

can you see the values when stopped at '********'?

Erik

Reply

0 ²erik malund over 14 years ago in reply to David Yong

int main (void)
{
        int i = 0;
        int sum = 0;

        for(i=0; i<10; i++) //***********************
        {
                sum = sum + i;
        }
        i = sum;
        while(1);
        //return 0;
}
I can reach the break point. But after I add variables "i" and "sum" to Watch 1 windows and

hit "F10" to step over the code. I can not see the i/sum value (the value show "<out of scope>".

"the break point" is not very informative

can you see the values when stopped at '********'?

Erik

Children

0 David Yong over 14 years ago in reply to ²erik malund

int main (void)
{
        int i = 0;
        int sum = 0;

        for(i=0; i<10; i++) //***********************break point 1
        {
                sum = sum + i;
        }
        i = sum;//break point 2
        while(1);
        //return 0;
}

can you see the values when stopped at '********'?

Erik
///////////////////////////////////////
No. I have set break point at break point 1 / 2. Both no value.