我正在使用 Xcode IDE 编写代码来比较标准 C 中的两个输入文件。我不断收到此错误：线程 1：EXC_BAD_ACCESS（代码=1，地址=0x0）。我已经对此进行了一些阅读，并认为这是一个内存问题，但无论我尝试什么，我似乎都无法修复它（我也尝试过使用 malloc 动态制作结构并将其列在底部编码）。这很奇怪，因为它会写入所有数据，然后在最后吐出那个错误。文件格式是这样的： start(int)..stop(int) id(+ or -) 现在一些我不关心的东西我刚刚在一个文件上测试了这个只有+ id，所以“-”方面不是问题的一部分。反正我已经很累了，已经盯着这个看了几个小时，如果没有请见谅
typedef struct
{
int start;
int stop;
char *strandID;
} location;
int main(int argc, const char * argv[])
{
if (argc != 4)
{
fprintf(stderr,
"Usage is ./a.out windowfile.txt genefile.txt outputFileName");
exit(-1);
}
//const vars
const char *windowInput = argv[1];
const char *geneInput = argv[2];
const char *outputfile = argv[3];
const int windowHeader = 9;
const int geneHeader = 3;
//get size of structures -- I have debugged and these work correctly, returning the size of my structure
const int posWsize = getSize(windowInput, "+", windowHeader);
const int negWsize = getSize(windowInput, "-", windowHeader);
const int posGsize = getSize(geneInput, "+", geneHeader);
const int negGsize = getSize(geneInput, "-", geneHeader);
//declare structs
location posWindow[posWsize];
location negWindow[negWsize];
location posGene[posGsize];
location negGene[negGsize];
//extract data here
getLocations(posWindow, negWindow, windowInput, windowHeader);
return 0;
}
void getLocations(location *posL, location *negL, const char *input,
const int header)
{
FILE *fileptr = NULL;
fileptr = fopen(input, "r"); //open file
if (fileptr == NULL)
{ //check for errors while opening
fprintf(stderr, "Error reading %s\n", input);
exit(-1);
}
char tmpLoc[20];
char tmpID[2];
int eofVar = 0;
int lineCount = 0;
while (lineCount < header)
{ //skip header and get to data
eofVar = fgetc(fileptr);
if (eofVar == '\n')
lineCount++;
}
int pCount = 0;
int nCount = 0;
while (eofVar != EOF)
{
fscanf(fileptr, "%s %s", tmpLoc, tmpID); //scan in first two strings
if (!strcmp(tmpID, "+"))
{ //if + strand
char *locTok = NULL;
locTok = strtok(tmpLoc, ".."); //tok and get values
posL[pCount].start = atoi(locTok);
locTok = strtok(NULL, "..");
posL[pCount].stop = atoi(locTok); //ERROR IS SHOWN HERE
posL[pCount].strandID = tmpID;
printf("start=%d\tstop=%d\tID=%s\tindex=%d\n", posL[pCount].start,
posL[pCount].stop, posL[pCount].strandID, pCount);
pCount++;
}
else if (!strcmp(tmpID, "-"))
{ //if - strand
char *locTok = NULL;
locTok = strtok(tmpLoc, ".."); //tok and get values
negL[nCount].start = atoi(locTok);
locTok = strtok(NULL, "..");
negL[nCount].stop = atoi(locTok);
negL[nCount].strandID = tmpID;
nCount++;
}
while ((eofVar = fgetc(fileptr)) != '\n')
{
if (eofVar == EOF)
break;
}
}
fclose(fileptr);
}
//dynamic way...same issue -- just replace this with the above if statement and use the create location function
if (!strcmp(tmpID, "+"))
{ //if + strand
int locStart;
int locStop;
locStart = atoi(strtok(tmpLoc, ".."));//tok and get values
locStop = atoi(strtok(NULL, ".."));
posL[pCount] = *createlocation(locStart, locStop, tmpID);
pCount++;
}
location *createlocation(int start, int stop, char *strandID)
{
location *tmp = NULL;
tmp = (location *) malloc(sizeof(location) * 1);
tmp->start = start;
tmp->stop = stop;
tmp->strandID = (char *) malloc(sizeof(char) * 2);
strcpy(tmp->strandID, strandID);
return tmp;
}
