Memory allocation: Difference between revisions
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(Added COBOL section. Corrected R lang tag.) |
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operator delete(p, whatever); // explicitly deallocate the memory |
operator delete(p, whatever); // explicitly deallocate the memory |
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}</lang> |
}</lang> |
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=={{header|COBOL}}== |
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In some implementations, programs with the <code>INITIAL</code> clause will have data in the <code>WORKING-STORAGE SECTION</code> stored on the stack. However, the COBOL standard does not specify where the data in a program should be stored. |
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Manual memory allocation is primarily done using <code>ALLOCATE</code> and <code>FREE</code>. They are used with data items with a <code>BASED</code> clause, which indicates that the data will be allocated at runtime. A <code>BASED</code> data item cannot be used before it has been allocated or after it has been freed. Example usage: |
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<lang cobol> PROGRAM-ID. memory-allocation. |
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DATA DIVISION. |
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WORKING-STORAGE SECTION. |
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01 based-data PIC X(20) VALUE "Hello, World!" |
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BASED. |
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PROCEDURE DIVISION. |
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*> INITIALIZED sets the data item to the VALUE. |
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ALLOCATE based-data INITIALIZED |
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DISPLAY based-data |
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FREE based-data |
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GOBACK |
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.</lang> |
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{{out}} |
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<pre>Hello, World!</pre> |
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=={{header|Common Lisp}}== |
=={{header|Common Lisp}}== |
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=={{header|R}}== |
=={{header|R}}== |
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<lang |
<lang rsplus>x=numeric(10) # allocate a numeric vector of size 10 to x |
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rm(x) # remove x |
rm(x) # remove x |
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