#include <stdio.h>
 
int main (void)
 
{
 
    float A, B;
    char op;
 
 
    switch(op)
            {
 
            case 43 : printf("%f", A 
+ B
);             break;
 
            case 45 : printf("%f", A 
- B
);             break; 
 
            case 42 : printf("%f", A 
* B
);             break;
 
            case 47 : printf("%f", A 
/ B
);             break;
 
            }
 
return 0;
}
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