求大神幫忙做壹道C語言簡單編程，要求如下

#include<stdio.h>

int main()

{

char c = 'Y';

float x,y,z;

char operate;

while(c=='Y' || c=='y')

{

printf("please enter number1:");

scanf("%f",&x);

printf("please enter operate:");

getchar();

scanf("%c",&operate);

printf("please enter number2:");

scanf("%f",&y);

switch(operate)

{

case '+':

z = x+y;

printf("%f + %f = %f\n",x,y,z);

break;

case '-':

z = x-y;

printf("%f - %f = %f\n",x,y,z);

break;

case '*':

z = x*y;

printf("%f * %f = %f\n",x,y,z);

break;

case '/':

z = x/y;

printf("%f / %f = %f\n",x,y,z);

break;

}

printf("Do you want to continue(Y/N or y/n):");

getchar();

scanf("%c",&c);

}

return 0;

}