Structure chart, Program design tool, Top-down design, Main program to sub-modules, Decomposition, Task into smaller modules, Module boxes, Tasks shown as boxes, Vertical lines, Show control flow, Parameter arrows, Data passed into modules, Stepwise refinement, More detail at each level, Diamond shape, Condition true or false, Semi-circular arrow, Indicates repetition, Identifier table, Defines data types, Username, Stores user input, Password, User's entered password, StoredPass, Correct password for comparison, NoAttempts, Failed login count, LoginSuccess, Login success indicator.

Structure Chart Components

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