0_0_19996655_17900.cpp: In constructor 'BigNum::BigNum()':
0_0_19996655_17900.cpp:18:42: error: 'memset' was not declared in this scope
BigNum(){len = 1;memset(a,0,sizeof(a));}
^
0_0_19996655_17900.cpp: In function 'std::istream& operator>>(std::istream&, BigNum&)':
0_0_19996655_17900.cpp:40:20: error: 'strlen' was not declared in this scope
int l=strlen(ch);
^
0_0_19996655_17900.cpp: In constructor 'BigNum::BigNum(int)':
0_0_19996655_17900.cpp:75:25: error: 'memset' was not declared in this scope
memset(a,0,sizeof(a));
^
0_0_19996655_17900.cpp: In constructor 'BigNum::BigNum(const char*)':
0_0_19996655_17900.cpp:86:25: error: 'memset' was not declared in this scope
memset(a,0,sizeof(a));
^
0_0_19996655_17900.cpp:87:15: error: 'strlen' was not declared in this scope
l=strlen(s);
^
0_0_19996655_17900.cpp: In copy constructor 'BigNum::BigNum(const BigNum&)':
0_0_19996655_17900.cpp:103:25: error: 'memset' was not declared in this scope
memset(a,0,sizeof(a));
^
0_0_19996655_17900.cpp: In member function 'BigNum& BigNum::operator=(const BigNum&)':
0_0_19996655_17900.cpp:111:25: error: 'memset' was not declared in this scope
memset(a,0,sizeof(a));
^
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