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This article mainly introduces what the module in the computer should be in line with the requirements of structured programming, which is very detailed and has a certain reference value. Interested friends must read it!

The module that meets the requirements of structured programming should represent the control logic of the program by using three basic control structures: sequence, selection and repetition (loop). Structured programming is a subset of procedural programming that uses logical structures for written programs, making it more effective and easier to understand and modify.

The operating environment of this tutorial: windows7 system, Dell G3 computer.

The module that meets the requirements of structured programming should represent the control logic of the program by using three basic control structures: sequence, selection and repetition (loop).

Structured programming (structured programming) is the basic principle of detailed design based on module function and process design. Structured programming is a subset of procedural programming that uses logical structures for written programs, making it more effective and easier to understand and modify.

Sequential structure

The sequential structure indicates that the operations in the program are performed in the order in which they appear.

Select structure

The selection structure indicates that there is a branch in the processing step of the program, and it needs to select one of the branches to execute according to a specific condition. The selection structure can be divided into three forms: single selection, double selection and multi-selection.

Cyclic structure

The loop structure means that the program repeatedly performs some operation or operations and can not terminate the loop until a condition is false (or true). The most important thing in the loop structure is: under what circumstances does the loop execute? What operations need to be performed in a loop? There are two basic forms of cycle structure: current cycle and straight-to-type cycle.

The current loop: it judges the condition first, executes the loop body when the given condition is met, and the process automatically returns to the loop entrance at the end of the loop; if the condition is not met, the exit loop body reaches the process exit directly. Because it is "execute the loop when the condition is met", that is, judge first and then execute, it is called the current loop.

Straight-to-type loop: it means that the loop body is executed directly from the entrance of the structure, and the condition is judged at the loop terminal. If the condition is not satisfied, the loop body continues to be executed at the entrance, and the loop is exited to the exit of the process until the condition is true. Execute first and then judge. Because it is "until the condition is true", it is called a straight-to-type loop.

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