C++中 for(int i=1;i<=3;i++){ for(int j=1;j<=3;j++){ cout<<ans[i][j]<<" \n"[j==3];是什么意思
时间: 2023-03-27 10:00:56 浏览: 62
这是一个嵌套循环,用于输出一个二维数组 ans 的元素。其中 i 和 j 分别代表数组的行和列,循环条件是 i 和 j 都小于等于 3。cout 用于输出数组元素," \n"[j==3] 的作用是在每行输出完毕后换行。
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对以下c++代码进行改编但不改变代码准确性:#include <iostream> #include <cstdio> #include <cmath> #include <cstring> using namespace std; typedef long long LL; const int N = 105, M = 2505, L = 20; const LL INF = 1e18; int n, m, K, l; LL d[N][N], w[N][N], g[L][N][N], f[N], t[N]; struct E{ int u, v, w; } e[M]; int main() { memset(g, 0x3f, sizeof g); scanf("%d%d%d", &n, &m, &K); l = log2(K); for (int i = 1; i <= n; i++) for (int j = 1; j <= n; j++) if (i != j) d[i][j] = INF; for (int i = 1; i <= m; i++) { scanf("%d%d%d", &e[i].u, &e[i].v, &e[i].w); d[e[i].u][e[i].v] = min(d[e[i].u][e[i].v], (LL)e[i].w); } for (int k = 1; k <= n; k++) for (int i = 1; i <= n; i++) for (int j = 1; j <= n; j++) d[i][j] = min(d[i][j], d[i][k] + d[k][j]); for (int i = 1; i <= n; i++) { for (int j = 1; j <= n; j++) { w[i][j] = d[i][j]; for (int k = 1; k <= m; k++) w[i][j] = min(w[i][j], d[i][e[k].u] - e[k].w + d[e[k].v][j]); g[0][i][j] = w[i][j]; } } for (int c = 1; c <= l; c++) for (int i = 1; i <= n; i++) for (int j = 1; j <= n; j++) for (int k = 1; k <= n; k++) g[c][i][j] = min(g[c][i][j], g[c - 1][i][k] + g[c - 1][k][j]); for (int i = 1; i <= n; i++) f[i] = d[1][i]; for (int c = 0; c <= l; c++) { if (K >> c & 1) { for (int i = 1; i <= n; i++) t[i] = f[i]; memset(f, 0x3f, sizeof f); for (int i = 1; i <= n; i++) for (int j = 1; j <= n; j++) f[i] = min(f[i], t[j] + g[c][j][i]); } } printf("%lld\n", f[n]); return 0; }
#include <iostream>
#include <cstdio>
#include <cmath>
#include <>
using namespace std; typedef long long LL const int N = 105, M = 2505, L = 20;
const LL INF = 1e18; int n, m, K, l;
LL d[N][N], w[N][N], g[L][N][N], f[N], t[N]; struct E{
int u, v, w;
} e[M]; int main() {
memset(g, 0x3f, sizeof g);
scanf("%d%d%d", &n, &m, &K);
l = log2(K);
for (int i = 1; i <= n; i++)
for (int j = 1; j <= n; j++) if (i != j) d[i][j] = INF;
for (int i = 1; i <= m; i++) {
scanf("%d%d%d", &e[i].u, &e[i].v, &e[i].w);
d[e[i].u][e[i].v] = min(d[e[i].u][e[i].v], (LL)e[i].w);
}
for (int k = 1; k <= n; k++)
for (int i = 1; i <= n; i++)
for (int j = 1; j <= n; j++) d[i][j] = min(d[i][j], d[i][k] + d[k][j]);
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= n; j++) {
w[i][j] = d[i][j];
for (int k = 1; k <= m; k++)
w[i][j] = min(w[i][j], d[i][e[k].u] - e[k].w + d[e[k].v][j]);
g[0][i][j] = w[i][j];
}
}
for (int c = 1; c <= l; c++)
for (int i = 1; i <= n; i++)
for (int j = 1; j <= n; j++)
for (int k = 1; k <= n; k++)
g[c][i][j] = min(g[c][i][j], g[c - 1][i][k] + g[c - 1][k][j]);
for (int i = 1; i <= n; i++) f[i] = d[1][i];
for (int c = 0; c <= l; c++) {
if (K >> c & 1) {
for (int i = 1; i <= n; i++) t[i] = f[i];
memset(f, 0x3f, sizeof f);
for (int i = 1; i <= n; i++)
for (int j = 1; j <= n; j++) f[i] = min(f[i], t[j] + g[c][j][i]);
}
}
printf("%lld\n", f[n]);
return 0;
}
int c,d,e=0; cin>>c>>d; if(c==0 && d==0) break; int a[c],b[d]; for(int i=0;i<c;i++){ cin>>a[i]; } for(int i=0;i<d;i++){ cin>>b[i]; } for(int i=0;i<c;i++){ for(int j=0;j<c-1;j++){ if(a[j]<a[j+1]){ swap(a[j],a[j+1]); } } } for(int i=0;i<d;i++){ for(int j=0;j<d-1;j++){ if(b[j]<b[j+1]){ swap(b[j],b[j+1]); } } } for(int i=0;i<c;i++){ cout<<a[i]<<' '; } cout<<endl; for(int i=0;i<d;i++){ cout<<b[i]<<' '; }bat把这段c++代码变成一个结构体,然后告诉我怎么调用
好的,这里将这段 C++ 代码转换成一个结构体:
```cpp
struct Sorter {
int c, d, e;
int a[100], b[100];
void sortArrays() {
for(int i = 0; i < c; i++) {
for(int j = 0; j < c - 1; j++) {
if(a[j] < a[j + 1]) {
swap(a[j], a[j + 1]);
}
}
}
for(int i = 0; i < d; i++) {
for(int j = 0; j < d - 1; j++) {
if(b[j] < b[j + 1]) {
swap(b[j], b[j + 1]);
}
}
}
}
void printArrays() {
for(int i = 0; i < c; i++) {
cout << a[i] << ' ';
}
cout << endl;
for(int i = 0; i < d; i++) {
cout << b[i] << ' ';
}
}
};
```
然后,你可以创建一个 `Sorter` 类型的对象,调用其中的成员函数来实现排序并输出结果。例如:
```cpp
Sorter sorter;
cin >> sorter.c >> sorter.d;
for(int i = 0; i < sorter.c; i++) {
cin >> sorter.a[i];
}
for(int i = 0; i < sorter.d; i++) {
cin >> sorter.b[i];
}
sorter.sortArrays();
sorter.printArrays();
```
请注意,上述代码中的输入和输出部分与原代码相同,但已根据结构体中的成员变量进行了修改。