无法使结构在 C 中工作(使用 GCC)

Question

所以我刚刚练习 C 中的结构，遇到了一个大问题......我附上了代码和错误 我尝试运行的代码是将预定义值放入结构中，然后打印它。

代码

#include <stdio.h>
struct student
{
    int sroll;
    char sname[20];
    int stotal;
}
int main()
{
    struct student st;
    clrscr();
    st.sroll = 1;
    strcpy(sname, "Example");
    st.stotal = 700
    printf("\n Roll => %d", st.sroll);
    printf("\n Name => %d", st.sname);
    printf("\n Total Marks => %d", st.stotal);
    return 0;
}

错误

$ gcc -o strpre strpre.c
strpre.c:8:1: error: expected ‘;’, identifier or ‘(’ before ‘int’
    8 | int main()
      | ^~~
strpre.c: In function ‘main’:
strpre.c:11:5: warning: implicit declaration of function ‘clrscr’ [-Wimplicit-function-declaration]
   11 |     clrscr();
      |     ^~~~~~
strpre.c:13:5: warning: implicit declaration of function ‘strcpy’ [-Wimplicit-function-declaration]
   13 |     strcpy(sname, "Example");
      |     ^~~~~~
strpre.c:13:5: warning: incompatible implicit declaration of built-in function ‘strcpy’
strpre.c:2:1: note: include ‘<string.h>’ or provide a declaration of ‘strcpy’
    1 | #include <stdio.h>
  +++ |+#include <string.h>
    2 | struct student
strpre.c:13:12: error: ‘sname’ undeclared (first use in this function); did you mean ‘rename’?
   13 |     strcpy(sname, "Example");
      |            ^~~~~
      |            rename
strpre.c:13:12: note: each undeclared identifier is reported only once for each function it appears in
strpre.c:14:20: error: expected ‘;’ before ‘printf’
   14 |     st.stotal = 700
      |                    ^
      |                    ;
   15 |     printf("\n Roll => %d", st.sroll);
      |     ~~~~~~          
strpre.c:16:25: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘char *’ [-Wformat=]
   16 |     printf("\n Name => %d", st.sname);
      |                        ~^   ~~~~~~~~
      |                         |     |
      |                         int   char *
      |                        %s

顺便说一句，我使用的是带有最新 GCC 版本的 CS50 IDE。

编辑:在我尝试了 @Robert 的修复后...它仍然不起作用... https://pastebin.ubuntu.com/p/mBjkR292wb/ 编辑2:我的错误没有添加分号

Answer 1

我想你漏掉了一个分号:

struct student
{
    int sroll;
    char sname[20];
    int stotal;
}; // <========================= missing ;

正如评论中所写，您还有另一个拼写错误:

strcpy(st.sname, "Example");