spss中个案和变量

The error: duplicate case value occurs in C programming, if there are two duplicate case values in the .

错误：如果在有两个重复的case值，则在C编程中会出现重复的case值。

Consider the below program – In this program, there are two case values, which are same. "Case 2" exists two times in the program.

考虑下面的程序–在该程序中，有两个大小写相同的值。 “情况2”在程序中存在两次。

#include 
    
     int main(void) {
   		int choice = 2;	switch(choice){
   	    case 1:	        printf("Case 1\n");	        break;	    case 2:	        printf("Case 2\n");	        break;	    	    case 3:	        printf("Case 3\n");	        break;	    	    case 4:	        printf("Case 4\n");	        break;	    	    case 2:	        printf("Case 5\n");	        break;	    	    default:	        printf("Case default\n");	}		return 0;}
    

Output

输出量

prog.c: In function ‘main’:prog.c:19:6: error: duplicate case value      case 2:      ^~~~prog.c:10:6: error: previously used here      case 2:      ^~~~

How to fix?

怎么修？

To fix the error: duplicate case value in C language, either remove the duplicate case and its block or change the duplicate case value.

要解决该错误：C语言中的重复案例值 ，请删除重复案例及其块，或者更改重复案例值。

Correct code – Here, I am removing the duplicate case "Case 2" which is exist second time in the program.

正确的代码 –在这里，我要删除程序中第二次存在的重复案例“案例2” 。

#include 
    
     int main(void) {
   		int choice = 2;	switch(choice){
   	    case 1:	        printf("Case 1\n");	        break;	    case 2:	        printf("Case 2\n");	        break;	    	    case 3:	        printf("Case 3\n");	        break;	    	    case 4:	        printf("Case 4\n");	        break;	    	    default:	        printf("Case default\n");	}		return 0;}
    

Output

输出量

Case 2

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spss中个案和变量