为何C语言求最大值程序输入8,10,25,75,100时结果为100而非8？

Hey there! Let's walk through exactly how your code works to clear up that confusion.

First, let's recap the key parts of your code:

• You initialize max = 0 and num_pos = 0
• You read 5 integers into the number array: [8, 10, 25, 75, 100]
• Then you loop through each element in the array to find the maximum value

Step-by-step breakdown of the second loop: #

Let's track the value of max and num_pos through each iteration of the loop (where j goes from 0 to 4):

• j=0: number[0] = 8 is greater than the initial max=0, so we update max=8 and num_pos=0. This is the part you noticed.
• j=1: number[1] = 10 is greater than the current max=8, so we update max=10 and num_pos=1.
• j=2: number[2] = 25 is greater than max=10, so max=25 and num_pos=2.
• j=3: number[3] = 75 is greater than max=25, so max=75 and num_pos=3.
• j=4: number[4] = 100 is greater than max=75, so max=100 and num_pos=4.

By the end of the loop, max gets updated every time we hit a number larger than the current maximum. That's why it doesn't stay at 8—it keeps getting replaced by bigger values as we check the rest of the array.

A quick optimization note: #

Right now, initializing max=0 works fine for positive numbers, but if all input numbers were negative (e.g., -5, -3, -10), the code would incorrectly return 0 as the maximum. To fix this, initialize max to the first element of the array instead:

int max = number[0];
int num_pos = 0;

This way, you start comparing against actual input values right from the start.

内容的提问来源于stack exchange，提问作者dev_cc