Align columns/C: Difference between revisions
m (moved Column Aligner/C to Align columns/C) |
(replaced with clean method) |
||
Line 2:
<lang c>#include <stdio.h>
char *str =
"Given$a$text$file$of$many$lines,$where$fields$within$a$line$\n"
"are$delineated$by$a$single$'dollar'$character,$write$a$program\n"
"that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$\n"
"column$are$separated$by$at$least$one$space.\n"
"Further,$allow$for$each$word$in$a$column$to$be$either$left$\n"
"justified,$right$justified,$or$center$justified$within$its$column.";
void align(char *in, char alignment)
{
int col, i, l, r;
int w[1024] = {0};
char *s = in;
for (i = 0; s[i] && s[i] != '$' && s[i] != '\n'; i++);
if (i > w[col]) w[col] = i;
if
if (!s[i]) break;
}
for (s = in, i = col = 0; s[i]; s += i + 1) {
for (i = 0; s[i] && s[i] != '$' && s[i] != '\n'; i++);
switch(alignment) {
case 'l': r = w[col] - i; break;
case 'c': r = (w[col] - i)/2; break;
case 'r': r = 0; break;
}
l = w[col++] - i - r + 1;
while (l--) putchar(' ');
printf("%.*s", i, s);
while (r--) putchar(' ');
if (s[i] != '$') {
putchar('\n');
col = 0;
}
if (!s[i]) break;
}
}
int main(void)
{
puts("\n---- right ----"); align(str, 'r');
puts("\n---- left ----"); align(str, 'l');
puts("\n---- center ----"); align(str, 'c');
return 0;
}</lang>
|
Revision as of 08:47, 11 May 2012
<lang c>#include <stdio.h>
char *str = "Given$a$text$file$of$many$lines,$where$fields$within$a$line$\n" "are$delineated$by$a$single$'dollar'$character,$write$a$program\n" "that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$\n" "column$are$separated$by$at$least$one$space.\n" "Further,$allow$for$each$word$in$a$column$to$be$either$left$\n" "justified,$right$justified,$or$center$justified$within$its$column.";
void align(char *in, char alignment) { int col, i, l, r; int w[1024] = {0}; char *s = in;
for (s = in, i = col = 0; s[i]; s += i + 1) { for (i = 0; s[i] && s[i] != '$' && s[i] != '\n'; i++);
if (i > w[col]) w[col] = i;
if (col++ >= 1024) abort(); /* artifical limit */
if (s[i] == '\n') col = 0; if (!s[i]) break; }
for (s = in, i = col = 0; s[i]; s += i + 1) { for (i = 0; s[i] && s[i] != '$' && s[i] != '\n'; i++);
switch(alignment) { case 'l': r = w[col] - i; break; case 'c': r = (w[col] - i)/2; break; case 'r': r = 0; break; } l = w[col++] - i - r + 1;
while (l--) putchar(' '); printf("%.*s", i, s); while (r--) putchar(' ');
if (s[i] != '$') { putchar('\n'); col = 0; } if (!s[i]) break; } }
int main(void) { puts("\n---- right ----"); align(str, 'r'); puts("\n---- left ----"); align(str, 'l'); puts("\n---- center ----"); align(str, 'c'); return 0; }</lang>