Thread: whats wrong with this piece of code?

hi, really annoying me now, it compiles, runs, and the add or mult work with the response part, but when it says enter the 2 numbers to either add or mult, when i hit enter it does nothing, just goes down, it just wont do the caculation.

Code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int mult ( int a, int b );
int add ( int c, int d );

int main()
{
    int a;
    int b;
    int c;
    int d;
    char e[5];
    

    printf( "Add or Mult: " );
    scanf( "%s", &e );
    if (strcmp ( e, "add" ) == 0 ) {
               printf( "enter two numbers to be added together: " );
               scanf( "%d", &c );
               scanf( "%d", &d );
    printf( "the product of your two numbers is %d\n", add( c , d);)}
    else if (strcmp ( e, "mult" ) == 0 ) {
         printf( "enter the two numbers you want to Multiply: " );
         scanf( "%d", &a );
         scanf( "%d", &b );
         printf( "the product of your numbers is %d\n", mult( a, b ) ) ;
         getchar();
         }
         }
         int mult (int a, int b)
         {
             return a * b;
             }
             int add (int c, int d)
             {
                 return c + d;
                 }

Well this program dosen't compile because of this line

Code:

 printf( "the product of your two numbers is %d\n", add( c , d);)}

The semi colon needs to follow the printf statment not the add statment like so

Code:

 printf( "the product of your two numbers is %d\n", add( c , d));}

And you will get a warning about main not returning a value otherwise the program works fine.

well, it does the calculation but u are not seeing it as the screen goes a way without asking for a to enter a key. thats because the 'Enter key has been lft in the input buffer'. u can over come this probem by just including i single statment in your code. and as Quantum1024 says there are few error which dont even compile your code. i have just changed few things in your code which could probably work fine now

Code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int mult ( int a, int b );
int add ( int c, int d );
void clear_buffer(void);

int main()
{
    int a;
    int b;
    int c;
    int d;
    char e[5];
    

    printf( "Add or Mult: " );
    scanf( "%s", &e );
    if (strcmp ( e, "add" ) == 0 ) {
               printf( "enter two numbers to be added together: " );
               fflush(stdin);
			   scanf( "%d ", &c);
               scanf( "%d", &d );
    printf( "the product of your two numbers is %d\n", add( c , d));}
    else if (strcmp ( e, "mult" ) == 0 ) {
         printf( "enter the two numbers you want to Multiply: " );
         scanf( "%d", &a );
         scanf( "%d", &b );
         printf( "the product of your numbers is %d\n", mult( a, b ) ) ;
         }
    	 clear_buffer();
		 getchar();
		 return 0;
         }
         int mult (int a, int b)
         {
             return a * b;
             }
             int add (int c, int d)
             {
                 return c + d;
                 }	
void clear_buffer()
{
 	 int ch;
 	 
 	 while((ch=getchar())!='\n' && ch!=EOF);
}

/* my ouput
Add or Mult: mult
enter the two numbers you want to Multiply: 2
2
the product of your numbers is 4
*/

ssharish2005