C语言乘法运算

#include <stdio.h>

int main() {
   int op1, op2, mul;      // variable declaration

   op1 = 5;                // variable definition
   op2 = 3;

   mul = op1 * op2;        // multiplication operation

   printf("Output of %d multiplied by %d is %d", op1, op2, mul);
}