
robot step sizes
hi again. i have a question on how to get my program to work. my program is to see how many steps a robot can take to get to a certain distance. the user inputs 3 step sizes and the distance. then, my program states how many possible ways the robot can travel the distance. for example, distance is 7. step sizes are 2,3,5. there are 5 possible ways to cover the distance (2+2+3,2+3+2,3+2+2,2+5,5+2).
now my question is how can i fix my recursive functions to work. how can i get the values of the step sizes into the recursive function. here is the code...
Code:
#include <stdio.h>
int steps(int dist);
main()
{
int a,b,c,d,e;
do
{
printf("Input small step: ");
scanf("%d", &a);
printf("Input medium step: ");
scanf("%d", &b);
printf("Input large step: ");
scanf("%d", &c);
if(a<=0b<=0c<=0a>=ba>=cb>=c)
printf("\nIllegal input! Please enter value again!\n\n");
}
while (a>=ba>=cb>=ca<=0b<=0c<=0);
do
{
printf("Input total distance to travel: ");
scanf("%d", &d);
}
while (d<=0);
printf("\nNumber of ways the robot can make the trip: %d\n", steps(d));
}
int steps(int dist)
{
if(dist <= 2)
return dist;
return steps(dista) + steps(distb) + steps(distc);
}

that's a huge if statement. Try using switch()

nothing wrong with that if statement. Code:
do
{
printf("Input total distance to travel: ");
scanf("%d", &d);
}
while (d<=0);
you rewrite over d until the last time that is what will mess you up. Once you fix that you could go through the array of d's until '\0'