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#include <string>
std::string basename(const std::string& path)
{
size_t pos = path.find_last_of('/');
//if (pos == std::string::npos) return std::string();
if (pos < path.size()-1) return std::string(path,pos+1);
else return std::string();
} |
...
Input from file value by value
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#include <sys/stat.h><fstream> // for ifstream bool dir_exists(const std::ifstream f("file.txt"); std::string& dir)val; while (f>>val) { struct stat st; if( (stat(dir.c_str(),&st) == 0) && (((st.st_mode) & S_IFMT) == S_IFDIR) ) return true; return false; } |
Check if file exists
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#include <fstream> // for ifstream
std::ifstream f("file.txt");
if(not f.good()) ...
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Input from file value by value
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#include <fstream> // for ifstream std::ifstream f("file.txt"); std::string val; while (f>>val) { std::cout << "val: " << val << std::cout << "val: " << val << '\n'; } f.close(); |
Input from file line by line
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#include <getopt.h>
#include <stdio.h>
#include <iostream>
//===================
void usage(char* name) {
std::cout << "Usage: " << name << " [-a <aaa>] [-b <bbb>] [-c <ccc>] [-h] <p1> [<p2> [<p3> ...]] \n";
}
//===================
int main (int argc, char **argv)
{
char *avalue = NULL;
char *bvalue = NULL;
char *cvalue = NULL;
int index;
int c;
extern char *optarg;
extern int optind, optopt, opterr;
while ((c = getopt (argc, argv, ":a:b:c:h")) != -1)
switch (c)
{
case 'a':
avalue = optarg;
printf ("a: avalue = %s\n",avalue);
break;
case 'b':
bvalue = optarg;
printf ("b: bvalue = %s\n",bvalue);
break;
case 'c':
cvalue = optarg;
printf ("c: cvalue = %s\n",cvalue);
break;
case 'h':
printf ("h: ");
usage(argv[0]);
break;
case ':':
printf ("(:) Option -%c requires an argument.\n", optopt);
usage(argv[0]);
return EXIT_FAILURE;
case '?':
printf ("?: Option -%c requires an argument.\n", optopt);
usage(argv[0]);
return EXIT_FAILURE;
default:
printf ("default: You should not get here... option -%c .\n", optopt);
abort default:();
}
printf ("defaultEnd of options: You should not get here... option -%c .avalue = %s, bvalue = %s, cvalue = %s\n",
optopt);
avalue, abortbvalue, (cvalue);
for (index = optind; index < argc; index++)
}
printf ("End of options: avalue = %s, bvalue = %s, cvalue = %s\n",
avalue, bvalue, cvalue);
for (index = optind; index < argc; index++)
printf ("Non-option argument %s\n", argv[index]);
return EXIT_SUCCESS;
}
Non-option argument %s\n", argv[index]);
return EXIT_SUCCESS;
}
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Check if directory exists
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#include <sys/stat.h>
bool dir_exists(const std::string& dir)
{
struct stat st;
if( (stat(dir.c_str(),&st) == 0) && (((st.st_mode) & S_IFMT) == S_IFDIR) ) return true;
return false;
} |
Check if file exists
| Code Block |
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#include <fstream> // for ifstream
std::ifstream f("file.txt");
if(not f.good()) ...
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Iterate over files in the directory
...
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