...主函数输入两个整数,用四个函数去求四则运算呢结果,主函数分别调 ...答:include<stdio.h>void main(){ int a(int x,int y);int b(int x,int y); int c(int x,int y);float d(float x,float y); int x,y; scanf("%d,%d",&x,&y); printf("x=%d,y=%d.\nx+y=%d.\nx-y=%d.\nx*y=%d.\nx/y=%f.\n",x,y,a(x,y),b(x,y),c(x,y...