若输入其他字符,则提示输入错误。...int y,int (*p)(int,int));
int add(int x, int y);
int sub(int x, int y);
int mult(int x, int y);
int divi...calc(a,b,sub);break;
case '*':result=calc(a,b,mult);break;
case '/':result=calc(a,b,divi...int y) {
return x - y;
}
int mult(int x, int y) {
return x * y;
}
int divi