yum install gcc
yum install gcc-c++ libstdc++-deve
sizof(char)=1
sizof(int)=4
sizof(short int)=2
sizof(long int)=8
sizof(long)=8
sizof(float)=4
sizof(uint)=4
sizof(uint16_t)=2
sizof(uint32_t)=4
sizof(uint64_t)=8
sizof(uint8_t)=1
sizof(stru_empty)=1
sizof(stru1)=12
sizof(stru2)=8
sizof(stru3)=12
sizof(stru4)=8
sizof(stru5)=16
sizof(stru6)=20
sizof(stru6.tt)=8
the address of stru6.i=-1112611352
the address of stru6.a=-1112611340
sizof(stru7)=12
sizof(stru7)=1
the address of stru7.i=-1112611368
the address of stru7.a=-1112611366
sizof(ar)=20
sizof(ar.f)=4
sizof(ar.arr)=12