编写一个程序来确定可以从键盘读取的最大字符数，用于特定的 'fgets()' 函数调用

Question

代码块包含一个 'fgets()' 函数。我的程序将如何解析代码并确定可以从键盘读取的最大长度？

#include <stdio.h>
int main(void) {
    char buffer[128], whole_line = 1, *ch;
    while (fgets(buffer, sizeof buffer, stdin)) { 
        if (whole_line) { 
            putchar('>');
        if (buffer[0]!='>') {
            putchar(' ');
        }
        }
        fputs(buffer, stdout); 
        for (ch = buffer; *ch && *ch!='\n'; ++ch); 
        whole_line = *ch == '\n';
    }
    if (!whole_line) {
        putchar('\n');
    }
    return 0;
}

Answer 1

#include <stdio.h>
int main(void) {
    int max_length = 0;
    int current_length = 0;

    char buffer[128], whole_line = 1, *ch;
    while (fgets(buffer, sizeof buffer, stdin)) { 
     if (whole_line) { 
         putchar('>');
        if (buffer[0]!='>') {
            putchar(' ');
        }
     }
     fputs(buffer, stdout); 
     for (ch = buffer; *ch && *ch!='\n'; ++ch, ++current_length);
     whole_line = *ch == '\n';
     printf("Length: %d\n", current_length);
    
      if(max_length < current_length) {
        max_length = current_length;
        printf("Max length: %d\n", max_length);
      }
     current_length = 0;
    }

    return 0;
}

当当前文本长度大于最大长度时，将当前指定为最大长度。然后它输出 max 到 console

编写一个程序来确定可以从键盘读取的最大字符数，用于特定的 'fgets()' 函数调用

Write a program to determine the maximum number of characters that can be read from the keyboard, for a specific 'fgets()' function call

c

fgets