麻烦的错误 [英] Pesky Error
问题描述
有人可以帮我弄清楚为什么会出现这个错误感谢
的帮助。
错误：
cc FordFulkerson.c
FordFulkerson.c:117：2：警告：文件末尾没有换行
代码：
＃包括< stdio.h>
#define白色0
#define灰色1
#define黑色2
#define MAX_NODES 1000
#define oo 1000000000
//声明
int n; //节点数
int e; //边数
int capacity [MAX_NODES] [MAX_NODES]; //容量矩阵
int flow [MAX_NODES] [MAX_NODES]; // flow matrix
int color [MAX_NODES]; //广度优先搜索需要
int pred [MAX_NODES]; //用于存储扩充路径的数组
int min（int x，int y）{
返回x< y？ x：y; //返回最小值x和y
}
//广度优先搜索队列
int head，tail ;
int q [MAX_NODES + 2];
void enqueue（int x）{
q [tail] = x;
tail ++;
color [x] = GREY;
}
int dequeue（） {
int x = q [head];
head ++;
color [x] = BLACK;
返回x;
}
//广度优先搜索扩充路径
int bfs（int start，int target ）{
int u，v;
for（u = 0; u< n; u ++）{
color [u] = WHITE ;
}
head = tail = 0;
enqueue（start）;
pred [start] = -1;
while（head！= tail）{
u = dequeue（）;
//搜索所有相邻的白色节点v。如果容量
//从剩余网络中的u到v是正的，
// enqueue v。
for（v = 0; v< n; v ++）{
if（color [v] == WHITE&&am磷; capacity [u] [v] -flow [u] [v]> 0）{
enqueue（v）;
pred [v] = u;
}
}
}
//如果目标节点的颜色现在为黑色，
//这意味着我们达到了它。
返回颜色[目标] ==黑色;
}
// Ford-Fulkerson算法
int max_flow（int source，int sink）{
int i，j，u;
//初始化空流量。
int max_flow = 0;
for（i = 0; i< n; i ++）{
for（j = 0; j< n; j ++）{
flow [i] [j] = 0;
}
}
//当存在扩充路径时，
//沿着这条路径增加流量。
while（bfs（source，sink））{
//确定我们可以增加流量的数量。
int increment = oo;
for（u = n-1; pred [u ]> = 0; u = pred [u]）{
增量= min（增量，容量[pred [u]] [u] -flow [pred [u]] [u]） ;
}
//现在增加f （。= u-n-1;
; PRED [U]> = 0; u = pred [u]）{
flow [pred [u]] [u] + =增量;
flow [u] [pred [u]] - =增量;
}
max_flow + =增量;
}
//不再增加路径。我们完成了。
返回max_flow;
}
//读取输入文件和主程序
void read_input_file（）{
int a，b，c，i，j;
FILE * input = fopen（" mf.in"，" ; r"）;
//读取节点数和边数
fscanf（输入，％d％d，& n，& e）;
//初始化空容量矩阵
for（i = 0; i< n; i ++）{
for（j = 0; j< ; n; j ++）{
容量[i] [j] = 0;
}
}
//读边缘容量
for（i = 0; i< e; i ++）{
fscanf（输入，'％d％d％d'，& a，& b，& c）;
容量[a] [b] = c;
}
fclose（输入） ;
}
int main（）{
read_input_file（）;
printf（" ;％d \ n"，max_flow（0，n-1））;
返回0;
}
再次感谢您的帮助。
有人可以帮我弄清楚为什么会出现这个错误感谢
求助。
错误：
cc FordFulkerson.c FordFulkerson.c:117：2：警告：文件末尾没有换行符
正是出于错误文本中给出的原因。
编译器期望换行符是源
文件中的最后一行。只需转到文件的最后，点击< ENTER>，然后它就会消失。
我不理解这个要求。当从Usenet文章中复制/粘贴代码时，我也倾向于看到很多
。 :-(
<剪掉很多代码，最后没有换行符>
-
BR，弗拉基米尔
我们应该有一个Vollyballocracy。我们选出六包总统。
每个人都服用直到他们搞砸了，此时他们轮换了。
- Dennis Miller
albert_re ... @ yahoo.com写道：有人可以帮我弄清楚为什么会出现这个错误感谢
求助。
错误：
cc FordFulkerson.c
FordFulkerson.c：117： 2：警告：文件末尾没有换行符
[剪掉超过100行代码]
你错过了在源文件的末尾需要换行符，
但是我看到你可能会因为过于神秘的错误而感到困惑
消息......
Robert Gamble
Robert Gamble写道：albert_ re ... @ yahoo.com写道：有人可以帮我弄清楚为什么会出现这个错误感谢
求助。
错误：
cc FordFulkerson.c
FordFulkerson.c：117：2：警告：文件末尾没有换行符
[剪掉超过100行代码]
您在源文件末尾缺少必需的换行符，
但是我看到您可能会对过于神秘的错误消息感到困惑
消息......
嗯，对于初学者来说，什么是换行符，是吗？是否与新行相同？
当我添加换行符时，我实际上并没有看到新行，请注意。
当然，当您跨平台移动源文件时，您可能需要使用新换行符来
。
并且不要让我开始关于文件结束......
S.
Could someone help me figure out why this error keeps occuring thanks
for the help.
error:
cc FordFulkerson.c
FordFulkerson.c:117:2: warning: no newline at end of file
Code:
#include <stdio.h>
#define WHITE 0
#define GRAY 1
#define BLACK 2
#define MAX_NODES 1000
#define oo 1000000000
//Declarations
int n; // number of nodes
int e; // number of edges
int capacity[MAX_NODES][MAX_NODES]; // capacity matrix
int flow[MAX_NODES][MAX_NODES]; // flow matrix
int color[MAX_NODES]; // needed for breadth-first search
int pred[MAX_NODES]; // array to store augmenting path
int min (int x, int y) {
return x<y ? x : y; // returns minimum of x and y
}
//A Queue for Breadth-First Search
int head,tail;
int q[MAX_NODES+2];
void enqueue (int x) {
q[tail] = x;
tail++;
color[x] = GRAY;
}
int dequeue () {
int x = q[head];
head++;
color[x] = BLACK;
return x;
}
//Breadth-First Search for an augmenting path
int bfs (int start, int target) {
int u,v;
for (u=0; u<n; u++) {
color[u] = WHITE;
}
head = tail = 0;
enqueue(start);
pred[start] = -1;
while (head!=tail) {
u = dequeue();
// Search all adjacent white nodes v. If the capacity
// from u to v in the residual network is positive,
// enqueue v.
for (v=0; v<n; v++) {
if (color[v]==WHITE && capacity[u][v]-flow[u][v]>0) {
enqueue(v);
pred[v] = u;
}
}
}
// If the color of the target node is black now,
// it means that we reached it.
return color[target]==BLACK;
}
//Ford-Fulkerson Algorithm
int max_flow (int source, int sink) {
int i,j,u;
// Initialize empty flow.
int max_flow = 0;
for (i=0; i<n; i++) {
for (j=0; j<n; j++) {
flow[i][j] = 0;
}
}
// While there exists an augmenting path,
// increment the flow along this path.
while (bfs(source,sink)) {
// Determine the amount by which we can increment the flow.
int increment = oo;
for (u=n-1; pred[u]>=0; u=pred[u]) {
increment = min(increment,capacity[pred[u]][u]-flow[pred[u]][u]);
}
// Now increment the flow.
for (u=n-1; pred[u]>=0; u=pred[u]) {
flow[pred[u]][u] += increment;
flow[u][pred[u]] -= increment;
}
max_flow += increment;
}
// No augmenting path anymore. We are done.
return max_flow;
}
//Reading the input file and the main program
void read_input_file() {
int a,b,c,i,j;
FILE* input = fopen("mf.in","r");
// read number of nodes and edges
fscanf(input,"%d %d",&n,&e);
// initialize empty capacity matrix
for (i=0; i<n; i++) {
for (j=0; j<n; j++) {
capacity[i][j] = 0;
}
}
// read edge capacities
for (i=0; i<e; i++) {
fscanf(input,"%d %d %d",&a,&b,&c);
capacity[a][b] = c;
}
fclose(input);
}
int main () {
read_input_file();
printf("%d\n",max_flow(0,n-1));
return 0;
}
Again thanks for the help.
al**********@yahoo.com opined:
Could someone help me figure out why this error keeps occuring thanks
for the help.
error:
cc FordFulkerson.c
FordFulkerson.c:117:2: warning: no newline at end of file
For exactly the reason given in the error text.
The compiler expects a newline as the very last thing in the source
file. Just go to the very end of the file, hit <ENTER>, and it
disappears.
I don''t the rational for this requirement. I also tend to see a lot of
this when copy/pasting code from Usenet articles. :-(
<snip lots of code with no newline at the very end>
--
BR, Vladimir
We should have a Vollyballocracy. We elect a six-pack of presidents.
Each one serves until they screw up, at which point they rotate.
-- Dennis Miller
albert_re...@yahoo.com wrote:Could someone help me figure out why this error keeps occuring thanks
for the help.
error:
cc FordFulkerson.c
FordFulkerson.c:117:2: warning: no newline at end of file
[snip over 100 lines of code]
You are missing the required newline at the end of your source file,
but I see how you might be confused from the overly cryptic error
message...
Robert Gamble
Robert Gamble wrote:albert_re...@yahoo.com wrote:Could someone help me figure out why this error keeps occuring thanks
for the help.
error:
cc FordFulkerson.c
FordFulkerson.c:117:2: warning: no newline at end of file
[snip over 100 lines of code]
You are missing the required newline at the end of your source file,
but I see how you might be confused from the overly cryptic error
message...
Well, for starters, what''s a "newline", eh? Is it the same as a "new line"?
I don''t actually see a new line when I add a newline, mind you. And, of
course, when you move your source files across platforms, you may have to
use new newlines.
And don''t get me started about "end of file"...
S.
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