Control Instructions - C Programming Questions and Answers

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Point out the error, if any in the program.

 #include
 int main() 
 {  
     int P = 10;   
     switch(P)     
    {
        case 10:        
        printf("Case 1");         

        case 20:    
        printf("Case 2");          
        break;      
    
        case P:   
        printf("Case 2");        
        break;  
    }   
    return 0; 
 }

Error: No default value is specified

Error: Constant expression required at line case P:

Error: There is no break statement in each case.

No error will be reported.

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Answer : Option B

Explanation :

The compiler will report the error "Constant expression required" in the line case P: . Because, variable names cannot be used with case statements.