Citation:
3 A block allows a set of declarations and statements to be grouped into one syntactic unit. The initializers of objects that have automatic storage duration, and the variable length array declarators of ordinary identifiers with block scope, are evaluated and the values are stored in the objects (including storing an indeterminate value in objects without an initializer) each time the declaration is reached in the order of execution, as if it were a statement, and within each declaration in the order that declarators appear.
La déclaration d'un bloc « seul » au milieu d'une fonction compile au moins avec gcc et le compilateur des Solaris, et j'ai vu le précompilateur de l'