qq_51719936的博客

1）错误，没有默认构造函数。如果显式地定义了构造函数，那么编译器将不会合成默认的构造函数

#include <iostream>using namespace std;int main() { int b=0,c=0,e=0; int arr[3][3]; for (int i = 0; i < 3; i++) { for (int j = 0; j < 3; j++) { cin >> arr[i][j]; } } for (int i = 0; i < 3; i++) { for (int j = 0; j &.

#include using namespace std;int main() {int a;cin >> a;for (int i = 0; i < a; i++) {for (int n = 0; n < 2 * a - 1; n++) {if (n + 1 + i< a || n + 1 >a + i)cout << " ";else cout << "";}cout << “\n”;}for (int i

#include using namespace std;int main() {int c = 0;for (int a = 100; a < 200; a++) {int b = 0; for (int i = 2; i < a; i++) { if (a % i == 0) { b = b + 1; break; } }if (b == 0) { cout << a << "\t"; c = c + 1; if (c =

#include using namespace std;int main() {int a, b=0;cout << “请输入一个大于1的数。”;cin >> a;for (int i = 2; i < a; i++) {if (a % i == 0) {b = b + 1;break;}}if (b == 1)cout << “这不是一个素数。”;else cout << “这是一个素数。”;}...

#include using namespace std;int main() {double area=0;for (int i = 1; i<=10; i++) {area = 3.14 * i * i;if (area > 100)break;cout << area << “\n”;}}

#include using namespace std;int main() {int a, s, d, f, g, h, j, k, l, z, q = 0, w = 0;cin >> a >> s >> d >> f >> g >> h >> j >> k >> l >> z;if (a > 0)q++;if (s > 0)q++;if (d >

#include using namespace std;int main() {int a, s, d, f, g, h, j, k, l, z, q = 0, w = 0;cin >> a >> s >> d >> f >> g >> h >> j >> k >> l >> z;if (a > 0)q++;if (s > 0)q++;if (d >

#include using namespace std;int main() {int a = 0, b = 0, c = 0, d = 0;for (int i = 0; i < 5; i++) {a++;cout << a << “\t”;}cout << “\n”;for (int i = 0; i < 5; i++) {b = b + 2;cout << b << “\t”;}cout <<

#include using namespace std;int main() {int a, b, c, s, p = 100;while (p < 999) { p++; a = p / 100; b = p / 10 % 10; c = p % 10; s = a * a * a + b * b * b + c * c * c; if (s == p) cout << s << "\n";}}

#include #include using namespace std;int main() {int a, b, c;double s, p;cin >> a >> b >> c ;p =(1/2)(a + b + c);s = sqrt(p * (p-a) * (p-c) * (p-b));cout << s;return 0;}

#include using namespace std;int main() {int x, y, z;cin >> x >> y >> z;if (x >=y,x>=z) {if (y >= z)cout << x << y << z;else cout << x << z << y;}if (y>= x ,y>=z){ if (x>= z