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Do not attempt to modify a string literal. Use a named array of characters to obtain a modifiable string.

Non-Compliant Code Example

In this example, the char pointer p is initialized to the address of the static string. Attempting to modify the string literal result results in undefined behavior.

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Compliant Solution

As an array initializer, a string literal specifies the initial values of characters in an array (as well as the size of the array). This code creates a copy of the string literal in the space allocated to the character array a. The string stored in a can be safely modified.

char a[] = "string literal";
a[0] = 'S';

Non-Compliant Code Example

In this non-compliant example, the mktemp() function modifies its string argument.

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