金海佳学C++primer 练习9.15/9.16

判断两个vector是否相等

Practice9.15

#include <iostream>#include <string>#include <vector>#include <algorithm>#include <list>#include <iterator>#include <cmath>#include <cstring>#include <forward_list>using namespace std;bool my_equal(vector<int> v1, vector<int> v2) {    int len1 = (int)v1.size();    int len2 = (int)v2.size();    if(len1 != len2) return false;    for(int i = 0; i < len1; i++) {        if(v1[i] != v2[i]) return false;    }    return true;}int main() {    vector<int> v1 = {1, 2, 3, 4};    vector<int> v2 = {1, 2, 3, 4};    /* test1 */    cout << "v1 == v2?" << endl;    cout << my_equal(v1, v2) << endl;    vector<int> v3 = {9, 8, 4, 4};    /* test2 */    cout << "v1 == v3?" << endl;    cout << my_equal(v1, v3) << endl;       return 0;}

Output

v1 == v2?1v1 == v3?0

Practice9.16

#include <iostream>#include <string>#include <vector>#include <algorithm>#include <list>#include <iterator>#include <cmath>#include <cstring>#include <forward_list>using namespace std;bool my_equal_2(list<int> l1, vector<int> v2) {    int len1 = (int)l1.size();    int len2 = (int)v2.size();    if(len1 != len2) return false;    auto it = l1.begin();    for(int i = 0; i < len2; i++) {        if(*it != v2[i]) return false;        it++;    }    return true;}bool my_equal(vector<int> v1, vector<int> v2) {    int len1 = (int)v1.size();    int len2 = (int)v2.size();    if(len1 != len2) return false;    for(int i = 0; i < len1; i++) {        if(v1[i] != v2[i]) return false;    }    return true;}int main() {    list<int> l1 = {1, 2, 3, 4};    vector<int> v1 = {1, 2, 3, 4};    vector<int> v2 = {8, 3, 45, 5};    /* test1 */    cout << "l1 == v1?" << endl;    cout << my_equal_2(l1, v1) << endl;    /* test2 */    cout << "l1 == v2?" << endl;    cout << my_equal_2(l1,v2) << endl;      return 0;}

Output

l1 == v1?1l1 == v2?0

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