习题4.2

#include<stdio.h>int main(){    long a,b;    float x,y;    scanf("%d,%d\n",a,b);    scanf("%5.2f,%5.2f\n",x,y);    printf("a=%d,b=%d\n",a,b);    printf("x=%d,y=%d\n",x,y);   return 0; }