如何注释下面的c语言？

#include
int main()
{ char b,c,d,e;
b='\43';
c='\103';
d='\x2a';
e='\x41';
printf("b=%c,c=%c,d=%c,e=%c\n",b,c,d,e);
printf(""good\40morning!\b"!\n");
printf("\123456");
return 0;
}

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