为什么老是提示:未声明的标识符a,b,望c语言大神指教答:这个最好的做法是,include<stdio.h>int Add(int a, int b);void Print(int x,int y);void main(){int a,b,y;printf("输入两个整数:");scanf("%d%d",&a,&b);printf("输入计算结果:");scanf("%d",&y);Print(Add(a,b),y);}int Add(int a,int b){ int c;c=a+b;return...