Thread: Stumped... Whats wrong here?

Hey Guys,

This is my first post ever, I can't figure what is wrong with this code. any help is greatly appreciated.

insert

Code:

#include<stdio.h>

int main() {                                                                       

    int x=0;                                                                       
    int y=0;                                                                       
    char input;

printf( "Andrew Fowler, Assingment5 part2\n\n" );
printf( "Use G, J, Y, N, T, U, B, M as arrow inputs. Type q to quit\n");

    while( input != 'q');
        {
        scanf(" %c", &input );
    
        if (input = 'g'){                                                                /*g = left move*/
            x= x-1;
            printf("Cordinates (X,Y) = (%d,%d)\n", x, y );}

        if (input = 'j'){                                                                /*j = right move*/
            x= x+1;
            printf("Cordinates (X,Y) = (%d,%d)\n", x, y );}

        if (input = 'y'){                                                                /*y = up*/
            y= y+1;
            printf("Cordinates (X,Y) = (%d,%d)\n", x, y );}

        if (input = 'n'){                                                                /*n = down*/
            y= y-1;
            printf("Cordinates (X,Y) = (%d,%d)\n", x, y );}

        if (input = 't'){                                                                /*t = up and left*/
            x= x-1;
            y= y+1;
            printf("Cordinates (X,Y) = (%d,%d)\n", x, y );}

        if (input = 'u'){                                                                /*u = up and right*/
            x= x+1;
            y= y+1;
            printf("Cordinates (X,Y) = (%d,%d)\n", x, y );}

        if (input = 'b'){                                                                /*b = down and left*/
            x= x-1;
            y= y-1;
            printf("Cordinates (X,Y) = (%d,%d)\n", x, y );}

        if (input = 'm'){                                                                /*m = down and right*/
            x= x+1;
            y= y-1;
            printf("Cordinates (X,Y) = (%d,%d)\n", x, y );}

        }
                                                                                    
    scanf(" %c", &input );                                                            /*Stops the Program from Ending Abruptly*/
    return 0;                                                                            /*Ends Programs*/

}

Sorry I forgot to post the error I am getting, here it is;

"Run-Time Check Failure #3 - The variable 'input' is being used without being initialized."

Hey Guys,

The tips are much appreciated, I have changed the code to a do - while orientation. However I don't see why trailing ; isn't helping?

> while( input != 'q');
The trailing ; isn't helping either

Thanks again,

AF

Code:

while (input != 'q');

is an infinite loop. The body of the while loop is empty thus "input" will never change.

The syntax of a while loop is

Code:

while ( condition ) 
{
    some statements
}

Bye, Andreas