这两个怎么做，求解答

Question

Answer 1

#include <stdio.h>
int main(void) {
    double xx[10], yy[5], max;
    int kk[10] = {0}, maxj, i, j, yindex = 0;
    for(i = 0; i < 10; i++) {
        scanf("%lf", &xx[i]);
    }
    for(i = 0; i < 5; i++) {
        for(j = 0; j < 10; j++) {
            if(kk[j] == 0) {
                max = xx[j];
                maxj = j;
                break;
            }
        }
        for(j = 1; j < 10; j++) {
            if(xx[j] > max && kk[j] == 0) {
                max = xx[j];
                maxj = j;
            }
        }
        kk[maxj] = 1;
        yy[yindex++] = max;
    }
    for(i = 0; i < 5; i++) {
        printf("%.1lf ", yy[i]);
    }
    return 0;
}