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39.
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<cstring>
int add(int?? ?x, int y);//声明函数
int main()
{
?? ?int a = 10;
?? ?int b = 20;
?? ?int sum = add(a,b);//函数调用
?? ?printf("%d", sum);
?? ?return 0;
}
int add(int x, int y)
{
?? ?int z = x + y;
?? ?return z;
}
40.
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<cstring>
int choose(int arr[],int sz,int k)
{
?? ?
?? ?int left = 0;
?? ?int right = sz - 1;//右下标
?? ?int mid = (left + right) / 2;
?? ?while (left<=right)
?? ?{
?? ??? ?int mid = (left + right) / 2;
?? ??? ?if (arr[mid] < k)
?? ??? ?{
?? ??? ??? ?left++;
?? ??? ?}
?? ??? ?else if (arr[mid] > k)
?? ??? ?{
?? ??? ??? ?right--;
?? ??? ?}
?? ??? ?else
?? ??? ?{
?? ??? ??? ?return mid;
?? ??? ?}
?? ??? ?
?? ?}
?? ?return 1;
}
int main()
{
?? ?int?? ?arr[20] = { 1,2,3,4,5,6,7,8,9,10 };
?? ?int left = 0;
?? ?int k = 11;
?? ?int sz = sizeof(arr) / sizeof(arr[0]);
?? ?int right = sz - 1;//右下标
?? ?int mid = (left + right) / 2;
?? ?int c = choose(arr,sz,k);
?? ?if (c==1)
?? ?{
?? ??? ?printf("找不到");
?? ?}
?? ?else
?? ?{
?? ??? ?printf("下标是 % d\n", c);
?? ?}
?? ?return 0;
}
41.
#include<stdio.h>
#include<string.h>
int contact(int a, int b, int c)
{
?? ?int m = a > b ? (a > c ? a : c) : (b > c ? b : c);
?? ?return m;
}
int main()
{
?? ?int a = 230;
?? ?int b = 30;
?? ?int c = 40;
?? ?int max = 0;
?? ?max = contact(a, b, c);
?? ?printf("%d", max);
?? ?return 0;
}
?
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