X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=blobdiff_plain;f=progs%2Fdemos%2FLorenz%2Florenz.c;h=93ed843bae626d8e1e9e6de876f69798914a3433;hb=e603b570558abad475caac516ffea700f0b3172f;hp=f4372d62f70f83f4a084d2f730b6e106b11b6b8a;hpb=cba16355bd8a2ce3e957e680e657bfc87de2c6d7;p=freeglut

diff --git a/progs/demos/Lorenz/lorenz.c b/progs/demos/Lorenz/lorenz.c
index f4372d6..93ed843 100644
--- a/progs/demos/Lorenz/lorenz.c
+++ b/progs/demos/Lorenz/lorenz.c
@@ -107,6 +107,16 @@ void advance_in_time ( double time_step, double position[3], double new_position
                       ( deriv0[i] + 2.0 * ( deriv1[i] + deriv2[i] ) + deriv3[i] ) ;
 }
 
+static void
+checkedFGets ( char *s, int size, FILE *stream )
+{
+  if ( fgets ( s, size, stream ) == NULL ) {
+    fprintf ( stderr, "fgets failed\n");
+    exit ( EXIT_FAILURE );
+  }
+}
+
+
 /* GLUT callbacks */
 
 #define INPUT_LINE_LENGTH 80
@@ -141,16 +151,16 @@ void key_cb ( unsigned char key, int x, int y )
     break ;
 
   case 'm' :  case 'M' :  /* Modify the Lorenz parameters */
-    printf ( "Please enter new value for <sigma> (default %lf, currently %lf): ", s0, sigma ) ;
-    fgets ( inputline, INPUT_LINE_LENGTH-1, stdin ) ;
+    printf ( "Please enter new value for <sigma> (default %f, currently %f): ", s0, sigma ) ;
+    checkedFGets ( inputline, sizeof ( inputline ), stdin ) ;
     sscanf ( inputline, "%lf", &sigma ) ;
 
-    printf ( "Please enter new value for <b> (default %lf, currently %lf): ", b0, b ) ;
-    fgets ( inputline, INPUT_LINE_LENGTH-1, stdin ) ;
+    printf ( "Please enter new value for <b> (default %f, currently %f): ", b0, b ) ;
+    checkedFGets ( inputline, sizeof ( inputline ), stdin ) ;
     sscanf ( inputline, "%lf", &b ) ;
 
-    printf ( "Please enter new value for <r> (default %lf, currently %lf): ", r0, r ) ;
-    fgets ( inputline, INPUT_LINE_LENGTH-1, stdin ) ;
+    printf ( "Please enter new value for <r> (default %f, currently %f): ", r0, r ) ;
+    checkedFGets ( inputline, sizeof ( inputline ), stdin ) ;
     sscanf ( inputline, "%lf", &r ) ;
 
     break ;
@@ -257,9 +267,9 @@ void display_cb ( void )
 
   /* Print the distance between the two points */
   glColor3d ( 1.0, 1.0, 1.0 ) ;  /* White */
-  sprintf ( string, "Distance: %10.6lf", distance ) ;
+  sprintf ( string, "Distance: %10.6f", distance ) ;
   glRasterPos2i ( 10, 10 ) ;
-  glutBitmapString ( GLUT_BITMAP_HELVETICA_12, (unsigned char *)string ) ;
+  glutBitmapString ( GLUT_BITMAP_HELVETICA_12, (unsigned char*)string ) ;
 
   glutSwapBuffers();
 }
@@ -347,7 +357,7 @@ int main ( int argc, char *argv[] )
   glutMainLoop () ;
 
 #ifdef WIN32
-    /* DUMP MEMORY LEAK INFORMATION */
+  /* DUMP MEMORY LEAK INFORMATION */
   _CrtDumpMemoryLeaks () ;
 #endif