#include <stdio.h>
int main(void) {
float a,b;
char ch;
scanf("%f%c%f", &a
, &ch
, &b
); switch (ch)
{
case '+': printf("=%.2f", a
+ b
); break; case '-': printf("=%.2f", a
- b
); break; case '*': printf("=%.2f", a
* b
); break; case '/': printf("=%.2f", a
/ b
); break; default: printf("Unknown operator"); }
return 0;
}
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