0_0_30003970_18213.cpp: In function 'int main()':
0_0_30003970_18213.cpp:5:2: error: expected unqualified-id before 'int'
int a[40];//记录长度;
^
0_0_30003970_18213.cpp:7:2: error: 'a' was not declared in this scope
a[1]=1,a[2]=a[3]=2,a[4]=4;//先初始化前四个长度;
^
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