Why Does Mixing `getline` and `>>` Operators Cause Input Omission in C ?

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Mixing getline and Operator>> Causes Input Omission

This code encounters an issue while attempting to retrieve user input for the jacket's price using getline. Despite prompting the user, the input is not collected, and the initial value of "0" is instead used.

The underlying problem lies in the mix of operator >> and getline usage. When using operator>>, the user's data is entered, followed by the Enter key, which inserts a newline character into the input buffer. However, operator>> is whitespace-delimited, meaning the newline character is not assigned to the variable and remains in the buffer.

Subsequently, when getline is called, it immediately finds the newline character in the buffer, fulfilling its search criterion, without prompting the user for input.

Solutions

To resolve this issue, consider the following options:

1. Use ignore or a Dummy Call to getline: Call ignore or perform a dummy getline call to eliminate the newline character from the buffer after using operator>>.
2. Exclusively Use getline: Eliminate operator>> and solely rely on getline. Then, convert your strings to the desired data types using functions such as stoi or stod for integers and doubles, respectively. This approach enhances code stability and robustness.

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