C语言编译预处理实验报告.docxVIP

C语言编译预处理实验报告实验名称：编译预处理一.实验目的(1)掌握文件包含、宏定义、条件编译、assert宏的使用。（2）练习带参数的宏定义、条件编译的使用。（3）练习assert宏的使用。（4）使用集成开发环境中的调试功能：单步执行，设置断点，观察变量。二、实验内容源程序改错：源程序：#include stdio.h#define SUM a+b#define DIF a-b#define SWAP(a,b) a=b, b=aint main(){ int b, t; printf(Input two integers a,b:); scanf(%d, %d, a, b); printf(\nSUM=%d\n the difference between square of a and square b is:%d,SUM,SUM*DIF); SWAP(a,b); Printf(\nNow a=%d,b=%d\n, a, b); return 0;}.2.源程序修改替换源程序：void main(void){ int a, b, c; float d, e; printf(Enter three integers:);scanf(%d, %d, %d, a, b, c);printf(\nthe maximum of them is %d\n, max(a,b,c)); printf(Enter two floating point numbers:); scanf(%f, %f, d, e); printf(\nthe sum of them is%f\n,sum(d,e));return 0;}int max(int x, int y, int z){ int t; if (x y) t = x; else t = y;if (t z) t = z; return t;}3.跟踪调试程序程序代码：#define Rint main(void){ float r, s; int s_integer = 0; printf(input a number:); scanf(%f, r); #ifdef R s = 3.14159 * r * r; printf(area of round is:%f\n, s); s_integer = integer_fraction(s); printf(the integer fraction of area is %d\n, s_integer); assert((s-s_integer) 1.0); #endif return 0;}int integer_fraction(float x){ int i = x; return i;}4.程序设计三、实验步骤及结果步骤：1.编写源程序对源程序进行编译，修改错误，运行修改后的程序。发现结果有误，进行调试。发现逻辑错误，修改后运行得到正确结果。结果：1、第一次编译后的报错：第一次修改后的程序和结果：#include stdio.h#define SUM a+b#define DIF a-b#define SWAP(a,b) a=b, b=aint main(){ int a,b; printf(Input two integers a,b:); scanf(%d%d, a, b); printf(\nSUM=%d\n the difference between square of a and square b is:%d,SUM,SUM*DIF); SWAP(a,b); printf(\nNow a=%d,b=%d\n, a, b); return 0;}发现程序仍有错误，进行调试得：#include stdio.h#define SUM (a+b)#define DIF (a-b)#define SWAP(a,b) ((t)=(a)), ((a)=(b)),((b)=(t))int main(){ int a,b,t = 0;printf(Input two integers a,b:); scanf(%d %d, a, b); printf(\nSUM=%d\n the difference between square of a and squa