3.
#include<iostream>using namespace std;int main(){char c1 = 'a', c2 = 'b', c3 = 'c', c4 = '\101', c5 = '\116';cout << c1 << c2 << c3 << '\n';cout << "\t\b" << c4 << '\t' << c5 << '\n';return 0;}
结果：
4.
#include<iostream>using namespace std;int main(){char c1 = 'C', c2 = '+', c3 = '+';cout << "I say: \"" << c1 << c2 << c3 << '\"';cout << "\t\t" << "He says: \"C++ is very interesting!\"" << '\n';return 0;}
结果：
5.
(1). -72.5;
(2). 11.5;
(3). 23;
(4). a = b = c = 9;
(5). a = b = 6;
(6). a = 6, b = 5;
(7). 2.5;
(8). 3 or 3.5;
6.
a = 12;
a += a; 24
a -= 3; 9
a *=2 + 3; 60 a /=a + a; 0 a %=(n%=2); 0 a += a -= a *= a; 0 7.
#include<iostream>using namespace std;int main(){int i, j, m, n;i = 8;j = 10;m = ++i + j++;n = (++i) + (++j) + m;cout << i << '\t' << j << '\t' << m << '\t' << n << endl;return 0;}
结果：
8.
#include<iostream>using namespace std;int main(){char c1 = 'C', c2 = 'h', c3 = 'i', c4 = 'n', c5 = 'a';int n = 4;c1 = c1 + n;c2 = c2 + n;c3 = c3 + n;c4 = c4 + n;c5 = c5 + n;cout << c1 << c2 << c3 << c4 << c5 << endl;return 0;}
结果：
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