Function:s2qch
From S2PLOT
(Difference between revisions)
| Revision as of 02:27, 23 November 2007 S2plot admin (Talk | contribs) ← Previous diff |
Current revision S2plot admin (Talk | contribs) |
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| Line 5: | Line 5: | ||
| <code><pre> | <code><pre> | ||
| - | int s2qch(void); | + | float s2qch(void); |
| </pre></code> | </pre></code> | ||
| Line 20: | Line 20: | ||
| #include <stdio.h> | #include <stdio.h> | ||
| #include <stdlib.h> | #include <stdlib.h> | ||
| + | #include <time.h> | ||
| #include "s2plot.h" | #include "s2plot.h" | ||
| Line 30: | Line 31: | ||
| } | } | ||
| - | int qch = s2qch(); /* Query character height */ | + | float qch = s2qch(); /* Query character height */ |
| - | char string[32]; | + | char string[32]; |
| - | sprintf(string,"Height = %d",qch); /* Write to string */ | + | sprintf(string,"Height = %.2f",qch); /* Write to string */ |
| - | s2textxy(0,0,0,string); /* Display text */ | + | s2textxy(-1,0,0,string); /* Display text */ |
| lkc = *kc; /* Update count */ | lkc = *kc; /* Update count */ | ||
| Line 42: | Line 43: | ||
| fprintf(stderr,"Press the <spacebar> to change character height"); | fprintf(stderr,"Press the <spacebar> to change character height"); | ||
| + | srand48((long)time(NULL)); /* Seed random numbers */ | ||
| s2opend("/s2mono", argc, argv); /* Open in mono mode */ | s2opend("/s2mono", argc, argv); /* Open in mono mode */ | ||
| s2swin(-1.,1., -1.,1., -1.,1.); /* Set the window coordinates */ | s2swin(-1.,1., -1.,1., -1.,1.); /* Set the window coordinates */ | ||
| s2box("BCDET",0,0,"BCDET",0,0,"BCDET",0,0); /* Draw coordinate box */ | s2box("BCDET",0,0,"BCDET",0,0,"BCDET",0,0); /* Draw coordinate box */ | ||
| - | + | ||
| cs2scb(cb); /* Install dynamic callback */ | cs2scb(cb); /* Install dynamic callback */ | ||
| s2show(1); /* Open the s2plot window */ | s2show(1); /* Open the s2plot window */ | ||
| Line 51: | Line 53: | ||
| return 1; | return 1; | ||
| } | } | ||
| + | |||
| </pre></code> | </pre></code> | ||
| [[S2PLOT:Function List | Back]] to S2PLOT function list. | [[S2PLOT:Function List | Back]] to S2PLOT function list. | ||
| __NOTOC__ | __NOTOC__ | ||
| __NOEDITSECTION__ | __NOEDITSECTION__ | ||
Current revision
s2qch
Query the character height.
Prototype
float s2qch(void);
Description
Query the characer height.
See Also
| s2sch | Set the character height |
Code Example
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "s2plot.h"
void cb(double *t, int *kc)
{
static int lkc = 0; /* Count of key presses */
if (lkc != *kc) { /* Space bar pressed? */
s2sch(drand48()*5+1); /* Choose random height */
}
float qch = s2qch(); /* Query character height */
char string[32];
sprintf(string,"Height = %.2f",qch); /* Write to string */
s2textxy(-1,0,0,string); /* Display text */
lkc = *kc; /* Update count */
}
int main(int argc, char *argv[])
{
fprintf(stderr,"Press the <spacebar> to change character height");
srand48((long)time(NULL)); /* Seed random numbers */
s2opend("/s2mono", argc, argv); /* Open in mono mode */
s2swin(-1.,1., -1.,1., -1.,1.); /* Set the window coordinates */
s2box("BCDET",0,0,"BCDET",0,0,"BCDET",0,0); /* Draw coordinate box */
cs2scb(cb); /* Install dynamic callback */
s2show(1); /* Open the s2plot window */
return 1;
}
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