#include
main(){
float data1,data2,sum;
char op;
scanf ("%f%c%f",&data1,&op,&data2);
switch(op){
case '+': sum=data1+data2; printf ("%f",sum);break;
case '-': sum=data1-data2; printf ("%f",sum);break;
case '*': sum=data1*data2; printf ("%f",sum);break;
case '/': sum=data1/data2; printf ("%f",sum);break;
}
}
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