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Displaying the Stack Contents [TOC]
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To view the entire stack content, the following function, info, can be used:

---- CODE(type=abc) ------------------------------------------------------------
fn info()                                                                        
{                                                                                
    printf("stack: ");                                                           
    for (local i: int = 0; i < stackSize; ++i) {                                 
        printf("[%d] ", stack[i]);                                               
    }                                                                            
    printf("\n");                                                                
}   
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Modify the instructions in main so that after each push/pop operation, the top
element and the entire stack content are displayed, producing output similar to
the following:

---- CODE(type=txt) ------------------------------------------------------------
lehn$ ./a.out 
top = 3
stack: [3] 
top = 4
stack: [3] [4] 
top = 3
stack: [3] 
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