2021级C语言第二次过程考核

• • 函数题：使用函数求Fibonacci数
  • 编程题
  • • 1.求集合数据的均方差
    • 2.求最大值及其下标
    • 3.选择法排序
    • 4.求矩阵各行元素之和
    • 5.组合数的和
    • 6.打印杨辉三角

int fib(int n){
	int a[n];
	a[0]=1;
	a[1]=1;
	for(int i=2;i
		a[i]=a[i-1]+a[i-2];
	}
	return a[n-1];
}

#include
#include
double setf(int a[],int N,double avg,double f);
int main(){
	int N;
	double avg=0,f=0;
	scanf("%d",&N);
	int A[N];
	for(int i=0;i
		scanf("%d",&A[i]);
		avg+=A[i];
	}
	avg/=N;
	f=setf(A,N,avg,f);
	printf("%.5lf",f);
	return 0;
}

double setf(int a[],int N,double avg,double f){
	double sum=0;
	for(int i=0;i
		sum+=(a[i]-avg)*(a[i]-avg);
	}
	sum/=N;
	f=sqrt(sum);
	return f;
}

#include
int main(){
	int n,max,I;
	scanf("%d",&n);
	int A[n];
	for(int i=0;i
		scanf("%d",&A[i]);
	}
	max=A[0];
	I=0;
	for(int i=1;i
		if(max
			max=A[i];
			I=i;
		}
	}
	printf("%d %d",max,I);
	return 0;
}

#include
int main(){
	int n,i,j;
	scanf("%d",&n);
	int a[n];
	for(i=0;i
		scanf("%d",&a[i]);
	}
	for(i=0;i
		for(j=i+1;j
		if(a[i]
			int temp=a[i];
			a[i]=a[j];
			a[j]=temp;
		}
		} 
	}
	for(i=0;i
		printf("%d",a[i]);
		if(i
			printf(" ");
		}
	}
	return 0;
} 

#include
int main(){
	int m,n,j,i;
	scanf("%d %d",&m,&n);
	int a[m];
	for(i=0;i
		a[i]=0;
		for(j=0;j
			int c;
			scanf("%d",&c);
			a[i]+=c;
		}
	}
	for(i=0;i
		printf("%dn",a[i]);
	}
	
	return 0;
}

#include
int main(){
	int N,i,j,sum=0;
	scanf("%d",&N);
	int a[N];
	for(i=0;i
		scanf("%d",&a[i]);
	}
	for(i=0;i
		for(j=0;j
			sum=sum+a[i]*10+a[j];
		}
		sum=sum-a[i]*10-a[i];
	}
	printf("%d",sum);
	return 0;
}

#include
int main(){
	int n,i,j;
	scanf("%d",&n);
	int a[n][n];
	for(i=0;i
		a[i][0]=1;
		a[i][i]=1;
	}
	for(i=2;i
		for(j=1;j
			a[i][j]=a[i-1][j-1]+a[i-1][j];
		}
	}
	for(i=0;i
		for(int cnt=i;cnt
			printf(" ");
		}
		for(j=0;j<=i;j++){
			printf("%4d",a[i][j]);
		}
		if(i
            printf("n");
        }
	}
	
	return 0;
}