我正在尝试在 C 中创建一个带有大小写开关和枚举的程序。我想插入在我的枚举日中预设的工作日。 该程序运行良好,但当输入工作日时,我收到错误。 代码如下所示:
#include <stdio.h>
int main(){
enum days{Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday};
enum days weekDay;
int i = 0;
printf("Insert a week day: ");
scanf("%s", weekDay);
switch(weekDay){
case Sunday:
i=i+1;
printf("Number of the day: %i", i);
break;
case Monday:
i=i+2;
printf("Number of the day: %i", i);
break;
(...)
case Saturday:
i=i+7;
printf("Number of the day: %i", i);
break;
default:
printf("Error. Please insert a valid week day.");
break;
}
如何正确地写这个?
最佳答案
带有 %s
说明符的
scanf
扫描字符串,而不是 enum
。确保您了解您正在使用的所有数据类型!
不幸的是,C 并不真正关心您分配给 enum
成员的实际名称:它们仅供程序员自己使用,程序本身无法访问。尝试这样的事情。
const char* names[] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", NULL}; // The name of each day, in order
char buffer[16]; // A place to put the input
scanf("%15s", buffer); // Now `buffer` contains the string the user typed, to a maximum of 15 characters, stopping at the first whitespace
for(int i=0; names[i] != NULL; i++){ // Run through the names
if(strcmp(buffer, names[i]) == 0){ // Are these two strings the same?
printf("Day number %d \n", i+1); // Add one because you want to start with one, not zero
return;
}
}
printf("Sorry, that's not a valid day"); // We'll only get here if we didn't `return` earlier
我已将工作日名称存储为字符串,程序可以访问这些字符串。但是比较字符串需要 strcmp
函数,而不是简单的 ==
,所以我不能再使用 switch-case,而必须使用循环。
关于c - 带有大小写开关和枚举的工作日,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/55310431/