Node: Mixed Declarations, Next: Function Attributes, Previous: Case Ranges, Up: C Extensions
ISO C99 and ISO C++ allow declarations and code to be freely mixed within compound statements. As an extension, GCC also allows this in C89 mode. For example, you could do:
int i; ... i++; int j = i + 2;
Each identifier is visible from where it is declared until the end of the enclosing block.