1.1 Program for defining macro using #define directives 1.2 Program for nested macro 1.3 Program for nested macro 1.4 Program for macro with parameters 1.5 Program for pragma directives 1.6 Program for error directives 1.7 Program for #if directives 1.8 Program for #ifef directives 1.9 Program #if #else directives 1.10 Program for #elif directives 1.11 Program for #endif directives 1.12 Program for predefined macro