我有一个文件已经获得了团队的详细信息。我需要代码来读取文件，并在第二个文件上写入胜率。我还需要使用指示的搜索功能搜索团队的细节。代码未写入百分比文件。当菜单显示时，将打印第一个文件的内容，但即使在进入搜索选项之前，代码也会退出。我只是在学习C.我很想知道它为什么不适合我。
#include <stdio.h>
#define NUM_TEAMS 50
#define LEN_LINE 40
#define LEN_NAME 25
char Name[NUM_TEAMS][LEN_NAME] = { 0 },
league[NUM_TEAMS][LEN_NAME],
division[NUM_TEAMS][LEN_NAME],
line[LEN_LINE];
int wins[NUM_TEAMS] = { 0 },
losses[NUM_TEAMS] = {0},
ties[NUM_TEAMS] = {0},
pWin[NUM_TEAMS] = {0};
int main (void) {
//getting the file
FILE *filePtr;
filePtr = fopen ("NFLStandings_20171031.txt", "r");
if (filePtr == NULL) {
printf ("Error: File did not open");
}
//executing
displayWelcome ();
select (filePtr);
fclose (filePtr);
return 0;
}
void displayWelcome ()
{
printf ("............WElCOME TO THE FOOTBALL ANALYSIS.............\n\n\n\n");
}
//read file
void readFile (FILE * filePtr)
{
int index = 0, count;
while (index < NUM_TEAMS && fgets (line, sizeof (line), filePtr) != NULL) {
sscanf (line, "%s%s%s%i%i%i", Name[index], league[index],
division[index], &wins[index], &losses[index], &ties[index]);
printf ("%s team in %s league and %s division has won [%i] "
"losing [%i] and tied in [%i] times \n",
Name[index], league[index], division[index], wins[index],
losses[index], ties[index]);
index++;
}
}
//find by name
void searchName (char name[], FILE * filePtr)
{
int index = 0;
while (index < NUM_TEAMS && fgets (line, sizeof (line), filePtr) != NULL) {
sscanf (line, "%s%s%s%i%i%i", Name[index], league[index],
division[index], &wins[index], &losses[index], &ties[index]);
if (Name[index] == name) {
printf ("The following team has the name");
printf ("%s team in %s league and %s division has won [%i] "
"losing [%i] and tied in [%i] times \n",
Name[index], league[index], division[index], wins[index],
losses[index], ties[index]);
index++;
}
}
if (index == 0)
printf ("Sorry! No teams Found with such name");
}
//find by league
void searchLeague (char league1[], FILE * filePtr)
{
int index = 0;
while (index < NUM_TEAMS && fgets (line, sizeof (line), filePtr) != NULL) {
sscanf (line, "%s%s%s%i%i%i", Name[index], league[index],
division[index], &wins[index], &losses[index], &ties[index]);
if (league[index] == league1) {
printf ("The League has the following teams");
printf ("%s team in %s league and %s division has won [%i] "
"losing [%i] and tied in [%i] times \n",
Name[index], league[index], division[index], wins[index],
losses[index], ties[index]);
index++;
}
}
if (index == 0)
printf ("Sorry! No teams Found with such League name");
}
//search by percentage win
void searchpWin (char pWin_[], FILE * filePtr)
{
int index = 0;
while (index < NUM_TEAMS && fgets (line, sizeof (line), filePtr) != NULL) {
sscanf (line, "%s%s%s%i%i%i", Name[index], league[index],
division[index], &wins[index], &losses[index], &ties[index],
&pWin[index]);
if (pWin[index] == pWin_) {
printf ("The Teams with the Percentage Win are the following ");
printf ("%s team in %s league and %s division has won [%i] "
"losing [%i] and tied in [%i] times \n",
Name[index], league[index], division[index], wins[index],
losses[index], ties[index]);
index++;
}
}
if (index == 0)
printf ("Sorry! No teams Found with such Percentage Win");
}
void searchDivision (char division1[], FILE * filePtr)
{
int index = 0;
while (index < NUM_TEAMS && fgets (line, sizeof (line), filePtr) != NULL) {
sscanf (line, "%s%s%s%i%i%i", Name[index], league[index],
division[index], &wins[index], &losses[index], &ties[index]);
if (division[index] == division1) {
printf ("The Division has the following teams");
printf ("%s team in %s league and %s division has won [%i] "
"losing [%i] and tied in [%i] times \n",
Name[index], league[index], division[index], wins[index],
losses[index], ties[index]);
index++;
}
}
if (index == 0)
printf ("Sorry! No teams Found with such Division name");
}
//selection user Menu
void select (FILE * filePtr)
{
int selection1 = 0;
int selection2 = 0;
do {
printf ("Select the options(by typing 1,2 or 3) below to proceed \n"
" 1. Print The Teams \n 2. Search Team \n 3. Exit \n");
selection1 = scanf ("%d", &selection1);
//incorrect choice
if (selection1 > 2) {
printf ("Invalid option! Try again");
}
//reading file
if (selection1 == 1) {
readFile (filePtr);
}
//option 2 Search data
if (selection1 == 2) {
printf ("Search by :\n 1. Team Name \n 2. By league \n "
"3. By division \n 4. By percentage wins \n");
selection2 = scanf ("%d", &selection2);
}
switch (selection2) {
case 1:
printf ("Team name : \n");
char name[10];
scanf ("%c", name);
searchName (name, filePtr);
break;
case 2:
printf ("League name : \n");
char league[10];
scanf ("%c", league);
searchLeague (league, filePtr);
break;
case 3:
printf ("Division name : \n");
char division[10];
scanf ("%c", division);
searchDivision (division, filePtr);
break;
case 4:
printf ("Percentage win : \n");
char pWin[10];
scanf ("%c", pWin);
searchpWin (pWin, filePtr);
break;
default:
printf ("Invalid option.Try again!\n\n");
break;
}
} while (selection1 == 0 || selection1 > 3);
}
答案 0 :(得分：0)
在评论中已经提到过，你应该总是把函数原型放在main（）函数之前，并且当文件没有正确打开时你应该返回一些错误代码（等等-1）。
你的选择功能一团糟。不要这样做以获得用户输入：
selection1 = scanf ("%d", &selection1);
scanf函数返回写入的字符总数或负数。所以你所做的就是将scanf的返回值赋给selection1。在您的情况下“选择选项（通过键入1,2或3）”，键入1,2或3，当您编写1个字符时，selection1将始终为1。你应该做的是：
scanf ("%d", &selection1);
现在进入开关声明......
scanf ("%c", name);
后面的语句“％c”读取单个字符。但你不想要一个角色，对吗？你想要一个字符串，所以也许试试这个：
scanf ("%s", name);
此外，对于selection2的整个switch语句是完全没有意义的，除非selection1是2，所以也许只有这样才能执行它将是一个好主意。
进入搜索功能：
if (Name[index] == name)
后者比较参考，而不是实际值。所以你可能想对strcmp（）函数做一些研究并在那里使用它。
你可以考虑在select函数的do-while循环中退出条件。您已经说过“1.打印团队\ n 2.搜索团队\ n 3.退出\ n”所以也许你应该在有人进入3时终止循环？
无论如何，我已经注意到了一些最重要的错误，并且通过一些更多的努力，你可能能够让你的代码工作，因为这不是一个有人为你做的地方，而是会给你一些建议和提示。但是，我真的建议你再次学习C编程语言的基础知识。当我开始学习它（比如2年前）作为初学者时，我发现Herbert Schildt的“自学C”非常有帮助。你可能想尝试一下。