вот, на скорую руку
| Код |
#include <stdio.h>
void PrintHelp();
typedef float FuncSq(float , float );
FuncSq CircleSq;
FuncSq RectSq;
FuncSq SquareSq;
int main(int argc, char *argv[] )
{
if( argc < 2 )
{
PrintHelp();
return 10;
}
FuncSq *pFunc;
float a = 0., b = 0.;
char cSym = argv[1][0];
switch( cSym )
{
case 'c'://circle
if( argc != 3 )
{
PrintHelp();
return 20;
}
if( sscanf( argv[2], "%f", &a ) != 1 )
{
PrintHelp();
return 20;
}
pFunc = CircleSq;
break;
case 'r'://rectangle
if( argc != 4 )
{
PrintHelp();
return 30;
}
if( sscanf( argv[2], "%f", &a ) != 1 )
{
PrintHelp();
return 30;
}
if( sscanf( argv[3], "%f", &b ) != 1 )
{
PrintHelp();
return 30;
}
pFunc = RectSq;
break;
case 's'://square
if( argc != 3 )
{
PrintHelp();
return 40;
}
if( sscanf( argv[2], "%f", &a ) != 1 )
{
PrintHelp();
return 40;
}
pFunc = SquareSq;
break;
default:
PrintHelp();
return 50;
}
printf( "\nSquare == %g", pFunc( a, b ) );
printf("\n\nPress <Enter> to continue\n");
getc(stdin);
return 0;
}
void PrintHelp()
{
printf("\nYou must use as the first command line parameter this letters:");
printf("\nPass 'c' - for circle, 'r' - rectangle, 's' - square" );
printf("\npass as second parameter radius for circle, side for squre," );
printf("\npass as second and third parameters sides for rectangle" );
printf("\nExample: project1.exe r 10 20" );
printf("\n\nPress <Enter> to continue\n");
getc(stdin);
}
float CircleSq( float r, float fake )
{
return 3.14*r*r;
}
float RectSq( float a, float b )
{
return a*b;
}
float SquareSq( float a, float fake )
{
return a*a;
}
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