hier der code:

#include <iostream>
#include <fstream>

using namespace std;

int main(int argc, char *argv[])
{
	if (argc == 5 && strcmp(argv[1], "bas") == 0)
	{
		ifstream inFile;
		inFile.open(argv[2], ios::in);
		if (!inFile.good())
		{
			cerr << "Couldn't open inFile " << argv[2] <<"!"<< endl;
			return -1;
		}
		int sidelength = atoi(argv[3]);
		if (1000000 % sidelength != 0)
		{
			cerr << "Sidelength has to be a factor of 1000000!";
			return -1;
		}
		ofstream outFile;
		outFile.open(argv[4]);
		if (!outFile.good())
		{
			cerr << "Couldn't open outFile " << argv[4] << "!" << endl;
			return -1;
		}
		char* pos;
		char* data;
		int x, y;
		int types[1000][1000];
		double alleleFreqs[1000][1000];
		inFile.close();
		outFile.close();
	}
	else
	{
		cerr << "usage:\tantsimulation_auswertung [bas] [bas-file] [side length of parts (int)]\n"
				"\t[outFile]"<< endl;
		return -1;
	}
	return 0;
}

Ich habe mal strace damit laufen lassen, hier der Output (der mir leider nicht wirklich viel sagt und der sich auch nicht in eine besser lesbare Form bringen lassen will):

execve("./antsimulationToR", ["./antsimulationToR", "bas", "/home/rebecca/bachelorarbeit/ant"..., "100", "/home/rebecca/bachelorarbeit/ant"...], [/* 35 vars */]) = 0
brk(0) = 0x602000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5e38c5f000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5e38c5d000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=128996, ...}) = 0
mmap(NULL, 128996, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f5e38c3d000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/usr/lib/libstdc++.so.6", O_RDONLY) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0@I\5\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=1014808, ...}) = 0
mmap(NULL, 3186696, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f5e38738000
mprotect(0x7f5e38827000, 2097152, PROT_NONE) = 0
mmap(0x7f5e38a27000, 36864, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xef000) = 0x7f5e38a27000
mmap(0x7f5e38a30000, 73736, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f5e38a30000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/libm.so.6", O_RDONLY) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\260>\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=526560, ...}) = 0
mmap(NULL, 2621672, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f5e384b7000
mprotect(0x7f5e38537000, 2093056, PROT_NONE) = 0
mmap(0x7f5e38736000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x7f000) = 0x7f5e38736000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/libgcc_s.so.1", O_RDONLY) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\240!\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=56072, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5e38c3c000
mmap(NULL, 2151816, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f5e382a9000
mprotect(0x7f5e382b6000, 2097152, PROT_NONE) = 0
mmap(0x7f5e384b6000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xd000) = 0x7f5e384b6000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/libc.so.6", O_RDONLY) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\340\342"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1436976, ...}) = 0
mmap(NULL, 3543672, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f5e37f47000
mprotect(0x7f5e3809f000, 2097152, PROT_NONE) = 0
mmap(0x7f5e3829f000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x158000) = 0x7f5e3829f000
mmap(0x7f5e382a4000, 17016, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f5e382a4000
close(3) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5e38c3b000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5e38c3a000
arch_prctl(ARCH_SET_FS, 0x7f5e38c3a6f0) = 0
mprotect(0x7f5e3829f000, 12288, PROT_READ) = 0
mprotect(0x7f5e38a27000, 24576, PROT_READ) = 0
munmap(0x7f5e38c3d000, 128996) = 0
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
+++ killed by SIGSEGV +++
Process 8445 detached

Wenn mir irgendjemand helfen könnte (oder auch nur eine Idee hätte, wie ich weitersuchen kann) wäre ich wirklich glücklich!

int main(int argc, char* argv[])
{
  argc == 5 && argv[1];
}

erzeugt also auch eine zugriffsverletzung?
oder meintest du ein anderes if?

bb

edit: ok, seppj sollte schon die richtige antwort gegeben haben^^