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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <malloc.h>
#define f(a,b) a##b
#define g(a) #a
#define h(a) g(a)
int main()
{
char a = 'a';
printf("%s\n",g(a)); // a
printf("%s\n",g(g(a))); // g(a)
printf("%s\n", h(f(1,2))); // 12
printf("%s\n", g(f(1,2))); // f(1,2)
printf("%s\n", g(h(f(1,2)))); // h(f(1,2))
printf("%s\n", h(g(f(1,2)))); // "f(1,2)"
printf("%s\n", h(h(f(1,2)))); // "12"
return 0;
}
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