燕山大学里仁学院C语言测试赛

布满荆棘的人生 2023-06-17 05:59 36阅读 0赞

### 燕山大学里仁学院C语言测试赛 ###

*   *   *  A+B（基本输入输出2）
         *  C基础-求偶数和
         *  C基础-等差数列
         *  谭浩强C语言(第三版)习题6.7
         *  【C语言训练】大、小写问题
         *  【排队买票】
         *  三角形

### A+B（基本输入输出2） ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxMTQ2NjUw_size_16_color_FFFFFF_t_70]

#include<bits/stdc++.h>
    using namespace std;
    typedef long long ll;
    
    int main(){ 
        ll a,b;
        int t;
        cin>>t;
        while(t--){ 
            cin>>a>>b;
            cout<<a+b<<endl;
        }
    }

### C基础-求偶数和 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxMTQ2NjUw_size_16_color_FFFFFF_t_70 1]

#include<bits/stdc++.h>
    using namespace std;
    typedef long long ll;
    
    int main(){ 
        ll a,b=0;
        int t;
        cin>>t;
        while(t--){ 
            cin>>a;
            if(a%2==0)b+=a;
        }
        cout<<b<<endl;
    }

### C基础-等差数列 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxMTQ2NjUw_size_16_color_FFFFFF_t_70 2]

#include<bits/stdc++.h>
    using namespace std;
    typedef long long ll;
    
    int main(){ 
        ll a=2,b=0;
        int t;
        cin>>t;
        while(t--){ 
           b+=a;
           a+=3;
        }
        cout<<b<<endl;
    }

### 谭浩强C语言(第三版)习题6.7 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxMTQ2NjUw_size_16_color_FFFFFF_t_70 3]

#include<bits/stdc++.h>
    using namespace std;
    typedef long long ll;
    
    int p[100];
    
    int main(){ 
    	int n,a,j,sum;
    	cin>>n;
    	for(int i=6;i<n;++i){ 
    		 sum = 1,a=0;p[a++]=1;
    		for( j=2;j*j<i;++j){ 
    			if(i%j==0){ 
    				sum+=j+i/j;
    				p[a++]=j;
    				p[a++]=i/j;
    			}			
    		}
    		if(j*j==i){ 
    			sum+=j;
    			p[a++]=j;
    		}
    		if(sum==i){ 
    			sort(p,p+a);
    			cout<<i<<" its factors are ";
    			for(j=0;j<a;++j)cout<<p[j]<<" ";
    			//这题末尾有一个空格
    			cout<<endl;
    		}
    	}
    }

### 【C语言训练】大、小写问题 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxMTQ2NjUw_size_16_color_FFFFFF_t_70 4]

#include<bits/stdc++.h>
    using namespace std;
    typedef long long ll;
    
    
    int main(){ 
    	char c;
    	while(~scanf("%c",&c)){ 
    		if(c>='A'&&c<='Z')c+=32;
    		printf("%c",c);
    	}
    }

### 【排队买票】 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxMTQ2NjUw_size_16_color_FFFFFF_t_70 5]

#include<bits/stdc++.h>
    using namespace std;
    typedef long long ll;
    
    
    ll f(int i){ 
    	ll sum=1;
    	for(int j=2;j<=i;++j)sum*=j;
    	return sum;
    }//计算阶乘
    
    int main(){ 
    	int m,n,k,sum=0;
    	int a[11];
    	cin>>m>>n>>k;
    	for(int i=0;i<k;++i) a[i]=-1;
    	for(int i=k;i<m;++i)a[i]=1;
    	do{ 
    		int x=0,j;
    		for( j=0;j<m;++j){ 
    			x+=a[j];
    			if(x<0)break;
    		}
    		if(j==m)sum++;
    	}while(next_permutation(a,a+m));
    	ll s = ((ll)sum)*f(n)*f(k);
    	cout<<s;
    }

### 三角形 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxMTQ2NjUw_size_16_color_FFFFFF_t_70 6]

#include<bits/stdc++.h>
    using namespace std;
    typedef long long ll;
    
    int a[101][101];
    int m[101][101];
    int t,n;
    int bfs(int i,int j){ 
    	if(i<j||i>n||j>n)return 0;
    	if(m[i][j])return m[i][j];
    	return m[i][j]=a[i][j]+max(bfs(i+1,j),bfs(i+1,j+1));
    }
    
    
    int main(){ 
    		cin>>t;
    	while(t--){ 
    		cin>>n;
    		for(int i=1;i<=n;++i){ 
    			for(int j=1;j<=i;++j){ 
    				cin>>a[i][j];
    				m[i][j]=0;
    			}
    		}
    		for(int i=1;i<=n;++i)m[n][i]=a[n][i];
    		cout<<bfs(1,1)<<endl;
    	}
    }

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