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PLOTTING OF TWO FUNCTIONS

Posted By: Viheke Fischer     Category: C Programming     Views: 3491

We have two functions of the type
y1 = exp ( -ax)
y2 = exp ( -ax2/2)
Plot the graphs of these functions for x varying from 0 to 5.0.

Code for PLOTTING OF TWO FUNCTIONS in C Programming

#include    <math.h>                                        
   main()                                                      
   {                                                           
       int  i;                                                 
       float  a, x, y1, y2;                                    
                                                               
       a = 0.4;                                                
       printf("                           Y -------> \n");     
       printf("  0 -----------------------------------------\n");                     
       for ( x = 0; x < 5;  x = x+0.25)                        
       {   /*  BEGINNING OF FOR LOOP  */
/*......Evaluation of functions .......*/
y1 = (int) ( 50 * exp( -a * x ) + 0.5 ); y2 = (int) ( 50 * exp( -a * x * x/2 ) + 0.5 ); /*......Plotting when y1 = y2.........*/
if ( y1 == y2) { if ( x == 2.5) printf(" X |"); else printf(" |"); for ( i = 1; i <= y1 - 1; ++i) printf(" "); printf("#\n"); continue; } /*...... Plotting when y1 > y2 .....*/
if ( y1 > y2) { if ( x == 2.5 ) printf(" X |"); else printf(" |"); for ( i = 1; i <= y2 -1 ; ++i) printf(" "); printf("*"); for ( i = 1; i <= (y1 - y2 - 1); ++i) printf("-"); printf("0\n"); continue; } /*........ Plotting when y2 > y1.........*/
if ( x == 2.5) printf(" X |"); else printf(" |"); for ( i = 1 ; i <= (y1 - 1); ++i ) printf(" "); printf("0"); for ( i = 1; i <= ( y2 - y1 - 1 ); ++i) printf("-"); printf("*\n"); } /*.......END OF FOR LOOP........*/
printf(" |\n"); } Output Y -------> 0 ---------------------------------------------------- | # | 0---* | 0------* | 0-------* | 0------* | 0------* | 0----* | 0-* | # | *-0 X | *---0 | *-----0 | *------0 | *-------0 | *-------0 | *-------0 | *-------0 |*-------0 |*------0 |*-----0
  
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Viheke Fischer
Viheke Fischer author of PLOTTING OF TWO FUNCTIONS is from Frankfurt, Germany.
 
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