问题描述
所以我只是在 C 中练习结构,我遇到了一个大问题......我附上了代码和错误 我试图运行的代码是在结构中放入一个预定义的值,然后打印出来。
#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;
}
$ 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
顺便说一下,我使用的是最新 GCC 版本的 CS50 IDE。
编辑:在我尝试了@Robert 的修复之后......它仍然无法正常工作...... https://pastebin.ubuntu.com/p/mBjkR292wb/
解决方法
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");