#define numeric_b '0'
#define numeric_e '9'
/** init string intervals ---*/
static char c0=numeric_b;
static char c1=numeric_b;
static char c2=numeric_b;
static char c3=numeric_b;
static char c4=numeric_b;
static char c5=numeric_b;
static char c6=numeric_b;
static char c7=numeric_b;
/** init start & end ----------------*/
static const char en = numeric_e +1;
static const char st = numeric_b +1;
void str_in(int length){
FILE * fp = fopen("list.txt","w");
switch(length){
case 0:
printf("%c\n",c0);break;
case 1:
printf("%c%c\n",c0,c1);break;
case 2:
printf("%c%c%c\n",c0,c1,c2);break;
case 3:
printf("%c%c%c%c\n",c0,c1,c2,c3);break;
case 4:
printf("%c%c%c%c%c\n",c0,c1,c2,c3,c4);break;
case 5:
printf("%c%c%c%c%c%c\n",c0,c1,c2,c3,c4,c5);break;
case 6:
printf("%c%c%c%c%c%c%c\n",c0,c1,c2,c3,c4,c5,c6);break;
case 7:
printf("%c%c%c%c%c%c%c%c\n",c0,c1,c2,c3,c4,c5,c6,c7);break;
}
fclose(fp);
}
void permute(int length){
while(c0<=en){
str_in(length);
c0++;
if(c0==en && length==0){break;}
if(c0==en){
c0=st;
c1++;
if(c1==en && length==1){break;}
if(c1==en){
c1=st;
c2++;
if(c2==en && length==2){break;}
if(c2==en){
c2=st;
c3++;
if(c3==en && length==3){break;}
if(c3==en){
c3=st;
c4++;
if(c4==en && length==4){break;}
if(c4==en){
c4=st;
c5++;
if(c5==en && length==5){break;}
if(c5==en){
c5=st;
c6++;
if(c6==en && length==6){break;}
if(c6==en){
c6=st;
c7++;
if(c7==en && length==7){break;}
}
}
}
}
}
}
}
}
}
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2Is this a question or something?Thomas Havlik– Thomas Havlik2010-12-26 04:03:34 +00:00Commented Dec 26, 2010 at 4:03
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1 Answer
Sorry @zartag but this is some seriously obfuscated code. Please just tell us in a paragraph what you're trying to do and what you think your code is doing.
The most obvious thing I can see wrong with your code with respect to the question title ("output to a file") is that you are using printf instead of fprintf. They behave almost identically, except that printf prints to standard output, and fprintf prints to a file stream (e.g. to your list.txt). See the documentation on fprintf. In your case it should be
FILE * fp = fopen("list.txt","w");
switch(length){
case 0:
fprintf(fp, "%c\n",c0);break;
..snip
But seriously that code is in dire need of refactoring (e.g. it looks like the whole switch block can be replaced with a for loop). And please, when you ask a question here, give us a little more to go on than a code listing and question title.
2 Comments
zarlag
the purpose of this is to output every combination of a character set in to a file. this code is a result of a algorithm that i came up with.
zarlag
lets start with 3 char intervals interval[a],[b],[c]. now output the initialized intervals with their starting char for example i will use numeric ('0'-'9')so the starting char = '0'.i than loop interval[c] until it reaches the ending char which equals to '9'. when [c] reaches ending == en than [c] = starting and [b] than increments and keeps a repeated loop until how many intervals have been reached.constantly repeat a loop of printf()s but every output is different from the one before. now how would i output all the possible outcomes to 1 signal file while having a newline after every result