scanf没有收集数据

Question

我在介绍C类,我遇到数据输入问题.我正在练习子程序,我的代码看起来是正确的,但程序中的一个问题由于某种原因被绕过,我无法弄清楚.

1)程序读入ISBN书号作为10个单独的字符(检查)

2)程序读入书的价格(支票)

3)该课程读取班级中的学生人数(检查)

4)该程序要求天气这本书是较新版本或旧版本(不工作!!)

5)该程序要求天气书是必需的或建议的(检查)

我正在使用char来解决有关新旧问题的问题,以及我们为了利用迄今为止所学到的知识而提出要求或建议的问题.

我无法理解为什么其中一个问题被绕过了.

这是我的输出:

Enter ISBN: 1231231231

Enter list price per copy: 54.99

Enter expected class enrollment: 45

Enter N for new edition or O for Older edition:
Enter R for Required or S for Suggested: R



ISBN: 1-23-123123-1

List Price:  54.99
Expected enrollment: 45
Edition, New or Old: 

Importance, Required or Suggested: R

如您所见,第四个问题的scanf将被忽略.这是我到目前为止编写的代码.任何帮助是极大的赞赏.
谢谢.

#include <stdio.h>

#define WHOLESALE 80

void getInput(char* a, char* b, char* c, char* d, char* e,
              char* f, char* g, char* h, char* i, char* j,
              float* listPrice, int* numStudents, char* edition, char* importance);
void calc();
void calcBooks();
void calcProfit();
void output();


int main (void) {
    // Local declarations
    float   listPrice;
    int     numStudents;
    char    edition;    
    char    importance;

    // ISBN char variables:
    char a; // 1
    char b; // 2
    char c; // 3
    char d; // 4
    char e; // 5
    char f; // 6
    char g; // 7
    char h; // 8
    char i; // 9
    char j; // 10

    // Get input
    getInput(&a, &b, &c, &d, &e, &f, &g, &h, &i, &j, &listPrice, 
             &numStudents, &edition, &importance);



    // Calculate 



    // Output 
    printf("\nISBN: %c-%c%c-%c%c%c%c%c%c-%c\n", a, b, c, d, e, f, g, h, i, j); // ISBN output
    printf("\nList Price: %6.2f", listPrice);
    printf("\nExpected enrollment: %d", numStudents);
    printf("\nEdition, New or Old: %c", edition);
    printf("\nImportance, Required or Suggested: %c", importance);

    return 0;
} // main 


/* =============== getInput ==========================================
    Gets input from the user.
    Pre:    addresses for ISBN (in seperate characters)
            and for listPrice, numStudents, importance, and edition.
    Post:   Passes back values thru the addresses.  
*/
void getInput(char* a, char* b, char* c, char* d, char* e,
              char* f, char* g, char* h, char* i, char* j,
              float* listPrice, int* numStudents, char* edition, char* importance)
{   
    printf("\nEnter ISBN: ");
    scanf("%c%c%c%c%c%c%c%c%c%c", a,b,c,d,e,f,g,h,i,j);

    printf("\nEnter list price per copy: ");
    scanf("%f", listPrice);

    printf("\nEnter expected class enrollment: ");
    scanf("%d", numStudents);

    printf("\nEnter N for new edition or O for Older edition: ");
    scanf("%c", edition);

    printf("\nEnter R for Required or S for Suggested: ");
    scanf("%c", importance);




    return;
} // getInput

Answer 1

"正常" scanf转换说明符(%d,%e,%s)跳过前导空格.%c转换说明符没有.

要强制跳过空格,请在格式字符串中包含空格:

scanf(" %c", &edition);

否则scanf将读取您用于上一行的[ENTER]