C:尝试从字符串末尾删除换行符

Question

我正在尝试编写一个程序，从用户输入中删除最后一个换行符，即用户在输入字符串后按回车键时生成的换行符。

void func4()
{

    char *string = malloc(sizeof(*string)*256); //Declare size of the string
    printf("please enter a long string: ");
    fgets(string, 256, stdin);  //Get user input for string (Sahand)
    printf("You entered: %s", string); //Prints the string

    for(int i=0; i<256; i++) //In this loop I attempt to remove the newline generated when clicking enter
                            //when inputting the string earlier.
    {
        if((string[i] = '\n')) //If the current element is a newline character.
        {
            printf("Entered if statement. string[i] = %c and i = %d\n",string[i], i);
            string[i] = 0;
            break;
        }
    }
    printf("%c",string[0]); //Printing to see what we have as the first position. This generates no output...

    for(int i=0;i<sizeof(string);i++) //Printing the whole string. This generates the whole string except the first char...
    {
        printf("%c",string[i]);
    }

    printf("The string without newline character: %s", string); //And this generates nothing!

}

但它的行为并不像我想象的那样。这是输出:

please enter a long string: Sahand
You entered: Sahand
Entered if statement. string[i] = 
 and i = 0
ahand
The string without newline character: 
Program ended with exit code: 0

问题:

1. 为什么程序似乎将 '\n' 与第一个字符 'S' 匹配？
2. 为什么当我没有从字符串中删除任何内容时，最后一行 printf("The string without newline character: %s", string); 根本没有生成任何输出？
3. 我怎样才能让这个程序按照我的意图去做？

Answer 1

条件 (string[i] = '\n') 将始终返回 true。它应该是 (string[i] == '\n')。