0_0_17076200_7604.cpp: In function 'bool c(Lstudent, Lstudent)':
0_0_17076200_7604.cpp:19:35: error: 'strcmp' was not declared in this scope
return (strcmp(a.Lname,b.Lname)<0);
^
0_0_17076200_7604.cpp: In function 'int main()':
0_0_17076200_7604.cpp:27:37: error: 'memset' was not declared in this scope
memset(book, 0, sizeof(book));
^
0_0_17076200_7604.cpp:56:61: error: 'strcpy' was not declared in this scope
strcpy(buf[count].Lname,book[b].name);
^
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