用C语言编写一个猜数游戏，能选择进行人出数计算机猜和计算机出数人猜

下面是一个简单的猜数游戏的 C 语言代码，支持人出数计算机猜和计算机出数人猜两种模式：

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

// 计算机出数，人猜
void computer_guess() {
    srand(time(NULL));
    int number = rand() % 100 + 1;
    printf("I have a number between 1 and 100. Can you guess what it is?\n");
    int guess, count = 0;
    do {
        printf("Enter your guess: ");
        scanf("%d", &guess);
        count++;
        if (guess > number) {
            printf("Too high! Try again.\n");
        } else if (guess < number) {
            printf("Too low! Try again.\n");
        }
    } while (guess != number);
    printf("Congratulations! You guessed the number in %d tries.\n", count);
}

// 人出数，计算机猜
void human_guess() {
    printf("Think of a number between 1 and 100, and I'll try to guess it.\n");
    int low = 1, high = 100, guess, count = 0;
    do {
        guess = (low + high) / 2;
        printf("Is it %d?\n", guess);
        printf("Enter '1' if it is too low, '2' if it is too high, or '3' if it is correct: ");
        int response;
        scanf("%d", &response);
        count++;
        if (response == 1) {
            low = guess + 1;
        } else if (response == 2) {
            high = guess - 1;
        }
    } while (guess != number);
    printf("I guessed the number in %d tries.\n", count);
}

int main() {
    printf("Welcome to the number guessing game!\n");
    printf("Enter '1' for computer out and human guess, or '2' for human out and computer guess: ");
    int mode;
    scanf("%d", &mode);
    if (mode == 1) {
        computer_guess();
    } else if (mode == 2) {
        human_guess();
    } else {
        printf("Invalid mode.\n");
    }
    return 0;
}

在这个程序中，`computer_guess` 函数实现了计算机出数，人猜的游戏模式，而 `human_guess` 函数实现了人出数，计算机猜的游戏模式。在 `main` 函数中，我们首先让用户选择游戏模式，然后根据选择调用相应的函数。在计算机出数，人猜的游戏模式中，我们使用 `rand` 函数生成一个随机数作为计算机所出的数，然后使用一个循环让用户猜测这个数。在人出数，计算机猜的游戏模式中，我们使用二分查找算法让计算机猜测用户所出的数，并根据用户的反馈调整猜测的范围，直到猜中为止。