CodePudding user response:

 
//input informationVoid input () {
FILE *fp; 
Stu xs./* define a structure variable to read out data from file */
If ((fp=fopen (" d: \ \ work \ \ C grade book \ \ C language TXT ", "wb"))==NULL) {
Printf (" \ nopen file error "); 
getchar(); 
The exit (1); 
} 
Printf (" \ n input format: name, student id C \ n "); 
Printf (" when input name for end to end entry \ n "); 
While (1) {
The scanf (" % s ", xs. Name); 
If (STRCMP (xs. The name, the "end")==0) break;//to determine whether a name for the LAST and judge by string 
The scanf (" % s % f ", & amp; Xs. Num, & amp; Xs. C); 
Fprintf (fp, "% s % s % f", xs. The name, xs, num, xs, c);//will result information written to the file 
} 
fclose(fp); 
} 

CodePudding user response:

 # include & lt; stdio.h> 
#include  
#include  

# define N 2 

Typedef struct 
{
Char name [10]. 
Char num [10]. 
Float c; 
} stu. 

Void input (); 
Void menu (); 

Int main () 
{
FILE *fp; 
If ((fp=fopen (" d: \ \ work \ \ C grade book \ \ C language TXT ", "wb"))==NULL) 
{
Printf (" \ nopen file error "); 
getchar(); 
The exit (1); 
} 
//char ch; 
int ch; 
While (1) 
{
menu();//display menu 
//ch=getchar ();//select menu 
The scanf (" % d ", & amp; Ch); 
//if (ch=='0') 
If (ch==0) 
break; 
//printf (" \ n ch=% d ", ch); 
The switch (ch)//judgment feature 
{
//case '1' : input (); break; 
Case 1: input (); break; 
} 
} 
Printf (" \ n \ n \ n \ t \ t \ \ t tWelcome to use, Goodbye! \ 02! \n"); 
return 0; 
} 
Void input () 
{
FILE *fp; 
int i=0; 
//puts (" helloworld! \n"); 
Stu xs [N]./* define a structure variable to read out data from file */
If ((fp=fopen (" d: \ \ work \ \ C grade book \ \ C. TXT ", "wb"))==NULL) 
{
Printf (" \ nopen file error "); 
getchar(); 
The exit (1); 
} 
Printf (" \ n input format: name, student id C \ n "); 
Printf (" when input name for end to end entry \ n "); 
While (1) 
{
//the scanf (" % s ", & amp; Xs [I] name); 
The scanf (" % s ", xs [I] name); 
If (STRCMP (xs [I]. The name, "end")==0) break;//to determine whether a name for the LAST and judge by string 
//the scanf (" % s % f ", & amp; Xs [I]. Num, & amp; Xs [I]. C); 
The scanf (" % s % f ", xs [I] num, & amp; Xs [I]. C); 
//fprintf (fp, "% s % s % f", xs [I]. C, xs [I] num, xs [I] c); 
Fprintf (fp, "% s % s % f", xs [I]. Name, xs [I] num, xs [I] c); 
i++;//will result information written to the file 
} 
fclose(fp); 
//} 
} 
Void menu () 
{
system("cls");//clear screen 
Printf (" \ n \ n \ n \ n \ t \ \ t t * * * * * * * * * c record thin * * * * * * * * * * * \ n "); 
Printf (" \ t \ \ t t |==========================================| \ n "); 
Printf (" \ t \ \ t t | * * * * * * * * * * * * * 1. Input information * * * * * * * * * * * * * * * | \ n "); 
Printf (" \ t \ \ t t | * * * * * * * * * * * * * 2. The query result * * * * * * * * * * * * * * * | \ n "); 
Printf (" \ t \ \ t t | * * * * * * * * * * * * * 3. Modify the information * * * * * * * * * * * * * * * | \ n "); 
Printf (" \ t \ \ t t | * * * * * * * * * * * * * 4. Add the student * * * * * * * * * * * * * * * | \ n "); 
Printf (" \ t \ \ t t | * * * * * * * * * * * * * 5. Delete the result * * * * * * * * * * * * * * * | \ n "); 
Printf (" \ t \ \ t t | * * * * * * * * * * * * * 6. Display result * * * * * * * * * * * * * * * | \ n "); nullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnull