C++ STL 中的取反函数
取反函数用于取反给定的值,以便改变这些值上的符号。它将负值变为正值,反之亦然。
函数原型
function transform(a_begin, a_end, a1_begin, negate()): a_begin = lower bound of the array. a_end = upper bound of the array. a1_end = Lower bound of the second modified array. negate() = to negate the values of the array.
示例代码
#include <algorithm> #include <functional> #include <iostream> using namespace std; int main() { int a[] = { 4,6,7, -10, -20, -30 }; transform(a, a + 6, a, negate<int>()); for (int i = 0; i < 6; i++) cout << a[i] << ' '; return 0; }
输出
-4 -6 -7 10 20 30
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