Flow Control Diagrams

Speed vs License

Variations on the program from Wednesday’s lecture: given the speed you were driving, and your license type, should you be arrested? Note: you can see the full code below the images.

first second third

Code:

// Are you breaking the speed limit?
// Andrew Bennett (z3378327)
// 2017-08-02


// DRIVING SPEED RULES

// LICENSE         MAX SPEED
// LEARNERS        80
// PROVISIONAL_1   90
// PROVISIONAL_2   100
// FULL            ?????

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


#define LEARNERS_LICENSE 0
#define P1_LICENSE      1
#define P2_LICENSE      2
#define FULL_LICENSE    3

int main() {

    int license;
    int speed;
    int speed_limit = 130;
    printf("What speed were you going? ");
    scanf("%d", &speed);

    printf("What license type do you have?\n");
    printf("Choices:\n");
    printf("0: Learners\n");
    printf("1: P1\n");
    printf("2: P2\n");
    printf("3: Full\n");

    scanf("%d", &license);


    // option A
    printf("A: ");
    if (speed > speed_limit) {
        printf("arrested\n");
    } else if (license == P2_LICENSE && speed > 100) {
        printf("arrested\n");
    } else if (license == P1_LICENSE && speed > 90) {
        printf("arrested\n");
    } else if (license == LEARNERS_LICENSE && speed > 80) {
        printf("arrested\n");
    } else {
        printf("not arrested\n");
    }

    // option B
    printf("B: ");
    if (speed > speed_limit) {
        printf("arrested\n");
    } else {
        if (license == P2_LICENSE && speed > 100) {
            printf("arrested\n");
        } else if (license == P1_LICENSE && speed > 90) {
            printf("arrested\n");
        } else if (license == LEARNERS_LICENSE && speed > 80) {
            printf("arrested\n");
        } else {
            printf("not arrested\n");
        }
    }

    // option D
    printf("D: ");
    if (speed > speed_limit) {
        printf("arrested\n");
    } else {
        if (license == LEARNERS_LICENSE) {
            if (speed > 80) {
                printf("arrested\n");
            } else {
                printf("not arrested\n");
            }
        }
        if (license == P1_LICENSE) {
            if (speed > 90) {
                printf("arrested\n");
            } else {
                printf("not arrested\n");
            }
        }
        if (license == P2_LICENSE) {
            if (speed > 100) {
                printf("arrested\n");
            } else {
                printf("not arrested\n");
            }
        }
        if (license == FULL_LICENSE) {
            printf("not arrested\n");
        }
    }

    
    // option E
    printf("E: ");
    if (speed > 80) {
        if (license == LEARNERS_LICENSE) {
            printf("arrested\n");
        } else {
            if (speed > 90) {
                if (license == P1_LICENSE) {
                    printf("arrested\n");
                } else {
                    if (speed > 100) {
                        if (license == P2_LICENSE) {
                            printf("arrested\n");
                        } else if (speed > 130) {
                            printf("arrested\n");
                        } else {
                            printf("not arrested\n");
                        }
                    } else {
                        printf("not arrested\n");
                    }
                }
            } else {
                printf("not arrested\n");
            }
        }
    } else {
        printf("not arrested\n");
    }
    
    

    // option F
    printf("F: ");
    if (license == LEARNERS_LICENSE) {
        if (speed > 80) {
            printf("arrested\n");
        } else {
            printf("not arrested\n");
        }
    }
    if (license == P1_LICENSE) {
        if (speed > 90) {
            printf("arrested\n");
        } else {
            printf("not arrested\n");
        }
    }
    if (license == P2_LICENSE) {
        if (speed > 100) {
            printf("arrested\n");
        } else {
            printf("not arrested\n");
        }
    }
    if (license == FULL_LICENSE) {
        if (speed > 130) {
            printf("arrested\n");
        } else {
            printf("not arrested\n");
        }
    }
    
    // option G
    printf("G: ");
    if (speed > speed_limit || (license == P2_LICENSE && speed > 100) || (license == P1_LICENSE && speed > 90) || (license == LEARNERS_LICENSE && speed > 80)) {
        printf("arrested\n");
    } else {
        printf("not arrested\n");
    }
    
    // option H
    printf("H: ");
    if (speed <= 80 && license == LEARNERS_LICENSE) {
	printf("not arrested\n");
    } else if (speed <= 80 && (license == P1_LICENSE || license == P2_LICENSE)) {
        printf("not arrested\n");
    } else if (speed <= 80 && (license == FULL_LICENSE || license == LEARNERS_LICENSE)) {
        printf("not arrested\n");
    } else if (speed > 80 && license == LEARNERS_LICENSE && license != P1_LICENSE) {
        printf("arrested\n");
    } else if (speed > 80 && license == P1_LICENSE && speed <= 90) {
        printf("not arrested\n");
    } else if (license == P2_LICENSE && speed > 80 && speed <= 100) {
        printf("not arrested\n");
    } else if (speed > 80 && license == FULL_LICENSE && speed <= speed_limit) {
        printf("not arrested\n");
    } else if (speed > 90 && license == P1_LICENSE) {
        printf("arrested\n");
    } else if (license == P2_LICENSE && speed > 100) {
        printf("arrested\n");
    } else if (speed > speed_limit) {
        printf("arrested\n");
    }   
}

Driving Age

Variations on the program from Monday’s lecture: are you old enough to drive?

Control flow diagram 1

Control flow diagram 2

// Can a user drive?
// Andrew Bennett (z3378327)
// 2017-07-31

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

#define MIN_DRIVING_AGE 16
#define MAX_DRIVING_AGE 120

int main (int argc, char *argv[]) {
    int age;
    
    // Print "How old are you?"
    printf("How old are you?\n");

    // Read in their age.
    if (scanf("%d", &age) == 1) {
    } else {
        printf("Invalid age\n");
        return EXIT_FAILURE;
    }   
    
    // Invalid age: not a number (eg "bananas").
    if (scanf("%d", &age) != 1) {
        printf("Invalid age\n");
        return EXIT_FAILURE;
    }
    
    // Print out their age, to visually check what the input was.
    printf("Your age is: %d\n", age);
      
    // Invalid age: negative number.
    if (age < 0) {
        printf("Invalid age\n");
        return EXIT_FAILURE;
    }
    
    // If their age is >= 16 and < 120, print "You can drive".
    // Otherwise: print "You cannot drive".
    if (age < MIN_DRIVING_AGE) {
        printf("You cannot drive\n");
    } else if (age < MAX_DRIVING_AGE) {
        printf("You can drive\n");
    } else {
        printf("You cannot drive\n");
    }
    
    // Print "Have a nice day."
    printf("Have a nice day :)\n");
    
    return EXIT_SUCCESS;
}