因为某些字段是空白的，所以我不能使用sscanf或strtok。解决方案似乎是使用正常工作的strsep。我的问题是数组中的所有先前结构似乎都被当前迭代的数组覆盖。
这是struct（在airPdata.h中）：
typedef struct airPdata{
char *siteNumber; // FAA Site Number
char *LocID; // Airport's "Short Name"
char *fieldName; // Airport Name
char *city; // Associated City
char *state; // State
char *latitude; // Latitude
char *longitude; // Longitude
char controlTower; // Control Tower
} airPdata;
这是我的代码：
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "airPdata.h"
int main(int argc, char* argv [])
{
FILE *fp;
char fileName[100];
char buf[250];
int i = 0,j;
struct airPdata airports[875];
char *token;
//request name of file with file type
printf("What is the name of the data file (including file type)? ");
scanf("%s", fileName);
//determine if file can be succesfully opened
fp = fopen(fileName, "r");
if(fp == NULL)
{
fprintf(stderr, "Can't open input file %s, Exiting safely...\n", fileName);
exit(EXIT_FAILURE);
}
//printing the header lines to stdout
printf("\n\n%-12s%-11s%-42s%-34s%-3s%-15s%-16s Tower\n","FAA Site", "Short Name", "Airport Name", "City", "ST","Latitude", "Longitude");
printf("%-12s%-11s%-42s%-34s%-3s%-15s%-16s =====\n","========", "==========", "============", "====", "==","========", "=========");
//reading in data to the structs
for(i = 0; i < 875; i++)
{
//allocate memory for the data in current struct
airports[i].siteNumber = malloc(51);
airports[i].LocID = malloc(51);
airports[i].fieldName = malloc(51);
airports[i].city = malloc(51);
airports[i].state = malloc(51);
airports[i].latitude = malloc(51);
airports[i].longitude = malloc(51);
//buffer for current line
if(fgets(buf, sizeof(buf), fp) == NULL) break;
char *line = buf;
/*sscanf(buf, "%[^,],%[^,],%[^,],%[^,],%[^,],%*[^,],%*[^,],%*[^,],%[^,],%[^,],%*[^,],%*[^,],%*[^,],%*[^,],%[^,],%*[^,],%*[^,],%*[^,],%*d",
airports[i].siteNumber,
airports[i].LocID,
airports[i].fieldName,
airports[i].city,
airports[i].state,
airports[i].latitude,
airports[i].longitude,
&airports[i].controlTower);*/
//iterates through the 15 values in the line (could be blank)
//and assigns data to values that are necessary
for(j = 1; j <= 15; j++)
{
//i use a switch case because I know which values I'm going to need
switch(j)
{
case 1:
airports[i].siteNumber = strsep(&line, ",");
break;
case 2:
airports[i].LocID = strsep(&line, ",");
break;
case 3:
airports[i].fieldName = strsep(&line, ",");
break;
case 4:
airports[i].city = strsep(&line, ",");
break;
case 5:
airports[i].state = strsep(&line, ",");
break;
case 9:
airports[i].latitude = strsep(&line, ",");
break;
case 10:
airports[i].longitude = strsep(&line, ",");
break;
case 15:
token = strsep(&line, ",");
airports[i].controlTower = token[0];
break;
default:
token = strsep(&line, ",");
}
}
}
//test printing
printf("%s\n", airports[0].fieldName);
printf("%s\n", airports[1].fieldName);
printf("%s\n", airports[2].fieldName);
printf("%s\n", airports[3].fieldName);
printf("%s\n", airports[4].fieldName);
fflush(stdout);
fclose(fp);
return 0;
}
5行预期输入：
03406.20*H,2FD7,AIR ORLANDO,ORLANDO,FL,ASO,ORL,PR,28-26-08.0210N,081-28-23.2590W,PR,,NON-NPIAS,,N,A,,0,18400
03406.36*H,2FL5,BROOKSVILLE INTL AIRWAYS- INC,ORLANDO,FL,ASO,ORL,PR,28-25-26.0000N,081-27-35.0000W,PR,,NON-NPIAS,,N,,,0,53800
03406.18*H,32FL,MEYER,ORLANDO,FL,ASO,ORL,PR,28-30-05.0120N,081-26-39.2560W,PR,,NON-NPIAS,,N,,,0,0
03406.11*H,37FA,FLORIDA HOSPITAL,ORLANDO,FL,ASO,ORL,PR,28-34-32.0020N,081-22-06.2490W,PR,,NON-NPIAS,,N,,,0,0
03406.31*H,3FD5,ARNOLD PALMER HOSPITAL,ORLANDO,FL,ASO,ORL,PR,28-31-21.0090N,081-22-49.2520W,PR,,NON-NPIAS,,N,,,0,0
我的测试printfs的预期输出（只是获取fieldName）：
AIR ORLANDO
BROOKSVILLE INTL AIRWAYS- INC
MEYER
FLORIDA HOSPITAL
ARNOLD PALMER HOSPITAL
输出我得到：
ARNOLD PALMER HOSPITAL
ARNOLD PALMER HOSPITAL
ARNOLD PALMER HOSPITAL
ARNOLD PALMER HOSPITAL
ARNOLD PALMER HOSPITAL
我无法弄清楚为什么我会得到这个输出。即使您有更好的解决方案，任何帮助将不胜感激。在此先感谢：）