这个问题在这里已有答案：
我正在为模拟飞行系统的任务编写C程序。文件读取函数必须从文件中填充并行数组，因此我选择逐行读取fgets。 read_flight函数对每一行进行标记，并将标记保存到通过引用传递的数组中（文件中最多30行）。每次保存后的printf语句只是用于验证每个变量是否已正确保存的临时代码。这段代码适用于前几行，然后程序终止，返回值为3221225477.从我在本网站上看到的内容来看，该代码表示分段错误，但我不能为我的生活找出原因，因为它与我读过的其他人不同。
如果我减少传递给read_flight函数的数组的第二维的大小，代码在终止之前由于某种原因运行得更远。
我的代码是（终止发生在read_flight函数中）：
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
//Function signatures
int menu (void);
void modify_flight(void);
void modify_reservation(void);
void report(void);
void read_flight(int (*flightNumber)[30],
char (*flightCityOrigin)[30][15],
char (*flightCityDest)[30][15],
char (*flightDate)[30][15],
char (*flightTime)[30][10],
int (*flightSeats)[30]);
void read_reservation(int (*resCode)[30],
int (*flightNum)[30],
char (*lName)[30][15],
char (*fName)[30][15],
char (*seatType)[30][8],
double (*seatCost)[30]);
void exit_program(void);
void clear (void);
//Global variables
const char FLIGHT_FILE[] = "flightc.txt"; //File name of flights file
const char RES_FILE[] = "reservationc.txt"; //File name of reservation file
int main(int argc, char *argv[]) {
int menuSel; //Integer to store menu selection
//Define parallel arrays to store information from flight file
int flightNumber[30];
char flightCityOrigin[30][15];
char flightCityDest[30][15];
char flightDate[30][15];
char flightTime[30][10];
int flightSeats[30];
//Define parallel arrays to store info from reservation file
int resCode[30];
int flightNum[30];
char lName[30][15];
char fName[30][15];
char seatType[30][8];
double seatCost[30];
//Call init functions
read_flight(&flightNumber, &flightCityOrigin, &flightCityDest, &flightDate, &flightTime, &flightSeats);
read_reservation(&resCode, &flightNum, &lName, &fName, &seatType, &seatCost);
//Display menu in a loop until user chooses option 4 (exit system)
do {
//Call our Menu function to get our selection value
menuSel = menu();
//Call appropriate function as per menu selection
switch (menuSel) {
case 1:
modify_flight();
break;
case 2:
modify_reservation();
break;
case 3:
report();
break;
}
} while (menuSel != 4);
//Call exit program function
exit_program();
//Return with a normal exit code of 0
return 0;
}
//This function prints the menu and returns the user's selection as an integer by value
int menu (void) {
//Print menu
printf("\n\tACME Airline System\n\n");
printf("\n1.\tAdd/modify flight information");
printf("\n2.\tAdd/modify reservation information");
printf("\n3.\tReport section");
printf("\n4.\tExit airline system\n\n");
//Perform input in a do-while-loop for input validation
int choice;
do {
printf("\n\tPlease make your selection >");
scanf("%i", &choice);
clear();
} while (choice > 4 || choice < 1);
return(choice);
}
//Stub
void modify_flight(void) {
printf("\n(Inside modify flight function)\n");
}
//Stub
void modify_reservation(void) {
printf("\n(Inside modify reservation function)\n");
}
//Stub
void report(void) {
printf("\n(Inside report function)\n");
}
//Read flight file and parse lines into variables to fill the arrays passed by pointer
void read_flight(int (*flightNumber)[30],
char (*flightCityOrigin)[30][15],
char (*flightCityDest)[30][15],
char (*flightDate)[30][15],
char (*flightTime)[30][10],
int (*flightSeats)[30]) {
//Open flight file for reading
FILE *flightFile;
flightFile = fopen(FLIGHT_FILE, "r");
if (flightFile) {
char *token; //Stores the current string token
int i = 0; //Counter variable for parallel arrays
char line[60]; //Stores each line read with fgets()
//Read file line by line, and parse each value into our parallel arrays. This
//function assumes that the flight file is in the correct format for tokenizing,
//I.E., that it contains the same number and format of tokens in each line.
while (fgets(line, 60, flightFile)) {
//Print line for testing
printf("%s", line);
//Get first token and store as flight number
token = strtok(line, " ");
*flightNumber[i] = atoi(token);
//Test
printf("\n%d", *flightNumber[i]);
//Store second token as origin city
token = strtok(NULL, " ");
strcpy(*flightCityOrigin[i], token);
//Test
printf("\n%s", *flightCityOrigin[i]);
//Store third token as destination city
token = strtok(NULL, " ");
strcpy(*flightCityDest[i], token);
//Test
printf("\n%s", *flightCityDest[i]);
//Store fourth token as flight date
token = strtok(NULL, " ");
strcpy(*flightDate[i], token);
//Test
printf("\n%s", *flightDate[i]);
//Store fifth token as flight time
token = strtok(NULL, " ");
strcpy(*flightTime[i], token);
//Test
printf("\n%s", *flightTime[i]);
//Get sixth token and store as number of seats available
token = strtok(NULL, " ");
*flightSeats[i] = atoi(token);
//Test
printf("\n%d\n\n", *flightSeats[i]);
//Increment counter for next line
i++;
}
//Free resources
fclose(flightFile);
}
}
//Read reservation file and parse lines into variables to fill the arrays passed by pointer
void read_reservation(int (*resCode)[30],
int (*flightNum)[30],
char (*lName)[30][15],
char (*fName)[30][15],
char (*seatType)[30][8],
double (*seatCost)[30]) {
printf("\n(Inside read reservation function)\n");
}
//Stub
void exit_program(void) {
printf("\n(Inside exit program function)\n");
}
//This function clears the input buffer after a scanf call to prevent input errors
void clear (void) {
int c;
while ((c = getchar()) != '\n' && c != EOF) {}
}
输入文件flightc.txt如下：
1234 Pittsburgh Phoenix 04/02/19 10:30am 108
4567 Boston New_York 04/03/19 18:10am 210
9876 Pittsburgh Seattle 04/04/19 1:30pm 110
8888 Chicago Pittsburgh 04/05/19 2:45pm 106
7777 Pittsburgh Miami 04/06/19 9:35am 116
2892 Las_Vegas New_York 04/07/19 8:10pm 107
4444 Pittsburgh San_Francisco 04/19/18 5:55pm 124
2222 Atlanta New_York 04/09/19 4:30pm 110
9281 Pittsburgh Seattle 04/11/19 2:15pm 216
1000 Pittsburgh Phoenix 04/12/19 3:25pm 150
从理论上讲，它应该填充这些数组，然后在到达文件末尾时退出，但它会运行几行然后终止。输出如下所示：
1234 Pittsburgh Phoenix 04/02/19 10:30am 108
1234
Pittsburgh
Phoenix
04/02/19
10:30am
108
4567 Boston New_York 04/03/19 18:10am 210
4567
Boston
New_York
04/03/19
18:10am
210
9876 Pittsburgh Seattle 04/04/19 1:30pm 110
9876
Pittsburgh
Seattle
04/04/19
1:30pm
110
8888 Chicago Pittsburgh 04/05/19 2:45pm 106
8888
--------------------------------
Process exited after 0.8375 seconds with return value 3221225477
Press any key to continue . . .
非常感谢你们所有帮助，你们可以帮助我找出它为什么突然停止按计划运作。我是一个Java家伙，而不是C家伙......
因此除了每个人给你提供一个简短例子的正确建议外，我还花时间深入挖掘你的代码并发现你的第一个问题。
strcpy(*flightCityOrigin[i], token);
[]优先于*，因此索引计算首先发生在*间接之前，这不是你的意图。我可以在调试窗口中看到，只有第一个令牌被复制到flightCityOrigin的第0个索引中。
解决方案是指定正确的运算符优先级，如下所示
strcpy((*flightCityOrigin)[i], token);
这也适用于您的后续阵列。
如果你仍然无法弄清楚其余部分，请告诉我。