[Dev-C++] A problem about using the debug in Dev-C++

[<per...@ya...>]

    I have used the Dev-C++ just a little time.Today,I write a very simple program trying to how to use the Debuger.In this process,I find the the color of the breakpoint will turn to blue if I delete the sentence (1) in the main().This should indicate the program has runed to the breakpoint. But if I reserve the sentence (1),the breakpoint' color will not change even I press the keyboard to input a data and this phenomenon certainly show the program has not executed to the breakpoint.
      How to use the Debuger If my program have the I/O function such as scanf()?I have read the help in Dev-C++,but its information is so few.I can't find my answer in its help.
---Thanks,
   Bruce.J
 
 
Here is my test program:
/* ********************************************* */
#include <stdio.h>
void test(int i)
{
    printf("Debuging, i = %d\n", i);  /* put a breakpoint in this line */
}
main()
{
    int i;
    scanf("%d", &i);   /* sentence (1) */
    test(i);
    system("PAUSE");
}



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