context: I have this college assignment I should something like rush hour game.. I have a park lot with cars in it, with a specific car (symboled with *) that should leave the lot (exit is at the middle line extreme left column). I should move the cars and get it out. for example, here is a given lot:

|1||1|| || || |
| || ||2||2||2|
| || ||*||*||*|
|3||3|| || || |
|3||3|| || || |

First thing, I need to ask the user to select a car to move, check if it even do exist in the lot, and if not, to ask him again to select a car. Here is the SelectCar function:

char SelectCar(char lot[MAX_LOT_LENGTH][MAX_LOT_LENGTH], int Length){
    char car;
    bool exists = false;
    printf("Enter the car you want to move:\n");
    scanf("%c",&car);
    for (int i = 0; i< Length; i  ){
        for (int j = 0; j<Length; j  ){
            if (lot[i][j] == car) {
                exists = true;
                
            }
        }
    }
    
    if(!exists) {
        printf("Invalid car id! enter again:\n");
        car = SelectCar(lot,Length);
    }
    printf("car selected\n");
    return car;
}

When I run the code, it skips the scanf function (It doesn't even ask to enter a car), so when it goes the for loop, "car" doesn't even exist in the lot, so it re-enters the SelectCar function, and when it reaches the scanf (the second time) it just crashes and gives me this error": /home/p10303/.vpl_launcher.sh: line 12: 1904456 Segmentation fault (core dumped) ./vpl_execution

I'm not sure what to do (I don't even understand what the issue is)

note: lot and length are defined and received by the user..

CodePudding user response：

I'm not sure what to do

Save time and enable all compiler warnings to quickly see troubles with char car; ... scanf("%d",car);

"%d" in scanf() expects a matching pointer to an int.