第六次C语言作业

#include<stdio.h>
int main() {
	int a[3][3] = { {1,2,3},{4,5,6},{7,8,9} };
	int sum = 0;
	int i;
	for (i = 0; i < 3; i++) {
		sum += a[i][i];
	}
	printf("%d", sum);
	return 0;
}

#include<stdio.h>
int main() {
	int a[11] = { 1,4,6,8,10,18,19,28,40,100 };
	int newnum;
	int pos = 10;
	scanf_s("%d", &newnum);
	int newpos=0;
	while (newpos<pos && newnum>a[newpos]) {
		newpos++;
	}
	int i;
	
	for (i = pos; i > newpos; i--) {
		a[i] = a[i - 1];
	}
	a[newpos] = newnum;
	pos++;
	for (i = 0; i < pos; i++) {
		printf("%d ", a[i]);
	}
	return 0;
		 
}

#include<stdio.h>
int main() {
	int a[5];
	int i;
	for (i = 0; i < 5; i++) {
		scanf_s("%d", &a[i]);
	}
	for (i = 5 - 1; i >= 0; i--) {
		printf("%d ", a[i]);
	}
	return 0;
}

#include <stdio.h>
int main() {
    int i;
    int j;
    int count = 0;  
    int unique;
    int a[10];
    for (i = 0; i < 10; i++) {
        scanf_s("%d", &a[i]);  
    }
    for (i = 0; i < 10; i++) {
        unique = 1;
        for (j = 0; j < i; j++) {
            if (a[i] == a[j]) {
                unique = 0;
                break;
            }
        }

        if (unique == 1) {
            count++;
        }
    }

    printf("%d", count);  
    return 0;
}

#include<stdio.h>
int main() {
	int i, j;
	int a[10];
	int again;
	for (i = 0; i < 10; i++) {
		scanf_s("%d", &a[i]);
	}
	for (i = 0; i < 10; i++) {
		again = 0;
		for (j = 0; j < i; j++) {
			if (a[i] == a[j]) {
				again = 1;
			}
		}
		if (again == 0) {
			printf("%d ", a[i]);
		}
	}
	return 0;
}

#include<stdio.h>
#include<stdlib.h>
int compare(const void* a, const void* b) {
	int* pa = (int*)a;
	int* pb = (int*)b;
	int num1 = *pa;
	int num2 = *pb;
	return num2 - num1;
}
int main() {
	int score[10] = { 92,78,85,63,96,71,88,59,90,62 };
	int k;
	printf("请输入要找前几高的分数（1-10）：");
	scanf_s("%d", &k);
	qsort(score, 10, sizeof(int), compare);
	printf("前%d高的分数分别是：", k);
	for (int i = 0; i < k; i++) {
		printf("%d", score[i]);
		if (i < k - 1) {
			printf(",");
		}
	}
	printf("分！");
	return 0;
}