用C语言怎么实现复制自己

#include <stdio.h>
#include <string.h>


int main(int argc, char *argv[])
{
char str[80];
int i = 0;
for(i = 0; i < 5; i++)
{
sprintf(str, "cp %s %d%s", argv[0], i, ".out");  //在WIN下用copy取代cp
system(str);
}
//printf("%s\n", str);
return 0;

}

下边是自己动手写的copy函数

#include <stdio.h>
#include <stdlib.h>
#include <string.h>


void copy_file(char *SrcFileName, char *DesFileName)
{
char buf[1024];
int read_len = 0;
FILE *in = NULL;
FILE *out = NULL;


if((in = fopen(SrcFileName, "rb")) == NULL)
{
printf("Open %s failure.\n", SrcFileName);
exit(1);
}


if((out = fopen(DesFileName, "wb")) == NULL)
{
printf("Open %s failure.\n", SrcFileName);
exit(1);
}


while((read_len = fread(buf, sizeof(char), 1024, in)) != 0) {
fwrite(buf, sizeof(char), read_len, out);
}

fclose(in);
fclose(out);
}
int main(int argc, char *argv[])
{
char str[80];
int i = 0;
char *find_result;


for(i = 0; i < 5; i++)
{
sprintf(str, "%d%s", i, ".out");
find_result = strrchr(argv[0], '/');
if (strcmp(str, find_result + 1) !=0 )
{
copy_file(argv[0], str);
}
}
printf("%s\n", str);
return 0;
}