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C++中的函数——习题1

兵部尚输 2022-01-25 阅读 55

810. 绝对值

https://www.acwing.com/problem/content/812/

#include <iostream>
using namespace std;

int main()
{
    int n;
    cin >> n;
    cout << abs(n) << endl;
    
    return 0;
}

806. 两个数的和

https://www.acwing.com/problem/content/808/

#include <iostream>
using namespace std;

double add(double x, double y)
{
    return x + y;
}
int main()
{
    double a,b;
    cin >> a >> b;
    printf("%.2lf",add(a,b));
    
    return 0;
}

807. 区间求和

https://www.acwing.com/problem/content/809/ 

#include <iostream>
using namespace std;

int sum(int n,int m)
{
    int a = 0;
    for(int i = n; i <= m; i++){
        a += i;
    }
    return a;
}

int main()
{
    int n,m;
    cin >> n >> m;
    cout << sum(n,m) << endl;
    
    return 0;
}

 809. 最小公倍数

https://www.acwing.com/problem/content/811/

#include <bits/stdc++.h>
using namespace std;

int main()
{
    int a,b;
    cin >> a >> b;
    cout << a*b/gcd(a,b);//gcd():求最大公因数
    
    return 0;
}

814. 复制数组

https://www.acwing.com/problem/content/816/ 

#include <iostream>
using namespace std;

void copy(int a[], int b[], int size)
{
    for (int i = 1; i <= size; i ++ )
        b[i] = a[i];
}

int main()
{
    int a[110], b[110], n, m, size;
    cin >> n >> m >> size;
    for (int i = 1; i <= n; i ++ )
        cin >> a[i];
    for (int i = 1; i <= m; i ++ )
        cin >> b[i];

    copy(a, b, size);

    for (int i = 1; i <= m; i ++ )
        cout << b[i] << ' ';

    return 0;
}

815. 打印字符串

https://www.acwing.com/problem/content/817/

#include <iostream>
#include <string>

using namespace std;

void print(string a)
{
    for (int i = 0; a[i]; i ++ )
        cout << a[i];
}

int main()
{
    string a;
    getline(cin, a);

    print(a);

    return 0;
}
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