在非常基本的C程序上使用GDB进行温度转换时，出现指出“ printf.c：没有这样的文件或目录的错误

Question

• 这是GDB向我显示的内容

(gdb) break main
Breakpoint 1 at 0x722: file homework1.c, line 4.
(gdb) run
Starting program: /home/aj_the_kid/ECE_373/homework1 
Breakpoint 1, main () at homework1.c:4
4   {
(gdb) step
8     printf("Enter the temperature (for conversion) in Fahrenheit:  ");
(gdb) step
__printf (
    format=0x555555554838 "Enter the temperature (for conversion) in Fahrenheit:  ") at printf.c:28
28  printf.c: No such file or directory.
(gdb) bt
 #0  __printf (
    format=0x555555554838 "Enter the temperature (for conversion) in Fahrenheit:  ") at printf.c:28
 #1  0x0000555555554742 in main () at homework1.c:8
(gdb) next
32  in printf.c
(gdb) next
33  in printf.c
(gdb) step
_IO_vfprintf_internal (s=0x7ffff7dd0760 <_IO_2_1_stdout_>, 
    format=0x555555554838 "Enter the temperature (for conversion) in Fahrenheit:  ", ap=ap@entry=0x7fffffffde20) at vfprintf.c:1244
1244    vfprintf.c: No such file or directory.
(gdb) step
1275    in vfprintf.c

• 这是我的Linux测试程序

#include <stdio.h>

int main()
{
  float temp_F, temp_C;

  // Prompt user for input (i.e. temp in Fahrenheit)
  printf("Enter the temperature (for conversion) in Fahrenheit:  ");
  scanf("%f\n", &temp_F);

  // Convert F to C
  temp_C = (temp_F - 32) * (5/9);
  printf("The temperature in Celsius is: %.2f\n", temp_C);

  return 0;

}

• 编辑：支持浮点型算术的固定代码

但是我仍然遇到一个问题，它要求我再次以空行输入华氏度，就像它没有第一次捕获用户输入的内容一样。>

终端视图

aj_the_kid@AJs-Sandbox:~/ECE_373$ rm file1
aj_the_kid@AJs-Sandbox:~/ECE_373$ gcc -g -o file1 file1.c
aj_the_kid@AJs-Sandbox:~/ECE_373$ ./file1
Enter the temperature (for conversion) in Fahrenheit:  32

32
The temperature in celcius is: 0.00
aj_the_kid@AJs-Sandbox:~/ECE_373$

这是GDB向我显示的（gdb）在0x722处中断主断点1：文件homework1.c，第4行。（gdb）运行启动程序：/ home / aj_the_kid / ECE_373 / homework1断点1，主处（homework1） .c：4 ...

Answer 1

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