C language: Use the parameters of the main function to implement an integer computer.

#include <stdio.h> #include <stdlib.h> #include <assert.h>int calculator (INT&NBSP;NUM1, &NBSP;CHAR&NBSP;*P,&NBSP;INT&NBSP;&NBSP;NUM2) {     if  (p ==  "-a")           return num1 + num2;      else if  (p ==  "-S")            return num1 - num2;     else if  (p ==  "-M")           return num1 * num2;      else if  (p ==  "-D")            return num1 / num2;     else           return -1;} Int main () {     char a;     char *p = &a;     int num1 = 0;     &NBSP;INT&NBSP;NUM2&NBSP;=&NBSP;0;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;SCANF ("%d%c%d",  &num1, &a, &NBSP;&AMP;NUM2);          if  (a ==  ' + ')           p =  "-a";     //"-A" Option to perform addition      else if  (a ==  '-')            p =  "-S";     //"-S" option to perform subtraction       else if  (a ==  ' * ')           p =   "-M";     //"-M" option to perform multiplication      else if  (a ==   '/')           p =  '-d ';     //"-d" option to perform division      else          p =  ';   '              int ret =  Calculator (num1, p, num2);      printf ("%d%c%d=%d\n",  num1, a,  num2, ret);      system ("Pause");     return  0;}

C language: Use the parameters of the main function to implement an integer computer.