5. guitar chord generator

I finally went out of my way to create my own original project—the Guitar Chord Generator. It lets users search for a chord and gives them the correct capo fret position along with an updated chord. It also generates chord progressions using the I-IV-vi-VI progression method, making it easier to write songs.

Honestly, building this was a pain and took forever just to get halfway done. Right now, I’m completely out of motivation, so I’m taking a break and picking it back up tomorrow. Still, it was a genius idea, considering how often I struggle to find the right chords. I might even end up using my own generator, which is kind of goated.

feeling like a genius. 8 out of 10.

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

int main(){

    int fret, newfret, options, genre;
    char startover;

    char key[10];
    char input[10];

    int i, index= -1;

    const char *sequence[] = {"C", "C#", "D", "D#", "E", "F", "F#", "G", "G#", "A", "A#", "B"};
    const char *commonkey[] = {"C", "D", "E", "F", "G", "A", "B"};

    int totalChords = sizeof(sequence) / sizeof(sequence[0]);
    int totalkey = sizeof(commonkey) / sizeof(commonkey[0]);
    //calculates the total number of elements in the chords array


    printf("\n======================================================\n");
    printf("Welcome to guitar chord generator! 🎸🔊\n");
    printf("choose the following! :\n");
    printf("1. generate sequence of chords for a song\n");
    printf("2. new chords with capo\n");
    printf("3. which fret should I put my capo on?\n");
    scanf("%d", &options);
    printf("======================================================\n");

    if (options == 2){

        printf("what fret is the capo on? : ");
        scanf("%d", &fret);
        printf("what fret do you want it to move it to? : ");
        scanf("%d", &newfret);
        printf("======================================================\n");

        do{                 //do while loop to loop the code until the user stops it
            printf("what chord do u have?: ");
            scanf("%9s", input);
            int move = newfret - fret;

            for (i = 0; i < totalChords; i++) {
                    //i = 0 start at the first element
                    //i < totalChords continue until all elements in "sequence" is checked
                    //i++ move to the next element 

                if (strcmp(input, sequence[i]) == 0) {
                    //strcmp compare input with sequence... if strcmp return 0 then both strings are identical

                    index = i; //matching string is stored in index
                    break;
                }
            }

            if (index != -1){ //if something is stored
                printf("Current chord (%dth fret): %s\n", fret, sequence[index]);
                if (index > 0){
                    printf("New chords (%dth fret): %s\n",newfret, sequence[index - move]);
                }

           } 

           printf("Do you want to enter a new chord? (y/n): ");
           scanf(" %c", &startover);

        } while(startover == 'y' || startover == 'Y');

        printf("Thank you for using our chord generator! ✨");

        return 0;





    }else if (options == 1){

        printf("what genre do you want to try out?\n");     //GENRES
        printf("1. pop\n");
        printf("2. rock\n");
        printf("3. blues\n");
        printf("4. jazz\n");
        printf("5. country music\n");
        scanf("%d", &genre);

        if (genre == 1){    //pop progression I-V-Vi-IV
            //Major Chords: C, D, E, F, G, A, B
            //Minor Chords: Am, Bm, C#m, Dm, Em, F#m, G#m

            printf("======================================================\n");
            printf("What key do you want to start with? (C, D, E, F, G, A, B): ");
            scanf("%9s", key);

            for (i = 0; i < totalkey; i++) {
                if (strcmp(key, commonkey[i]) == 0) {
                    index = i; //matching string is stored in index
                    break;
                }
            }

            if (index!= -1 && index <= totalkey - 4){ //if something is stored
                printf("Key: %s key progression idea: \n", commonkey[index]);
                printf("Verse 1: %s, %s, %sm, %s\n", commonkey[index], commonkey[index + 4], commonkey[index+5], commonkey[index + 3]);
                printf("Chorus: %s, %sm, %s, %s\n", commonkey[index], commonkey[index + 5], commonkey[index+3], commonkey[index + 4]);
                printf("Verse 2: %s, %s, %sm, %s\n", commonkey[index], commonkey[index + 4], commonkey[index+5], commonkey[index + 3]);
                printf("Chorus: %s, %sm, %s, %s\n", commonkey[index], commonkey[index + 5], commonkey[index+3], commonkey[index + 4]);
                printf("Bridge: %sm, %s, %s, %s\n", commonkey[index + 4], commonkey[index], commonkey[index+3], commonkey[index + 5]);
                printf("Chorus: %s, %sm, %s, %s\n", commonkey[index], commonkey[index + 5], commonkey[index+3], commonkey[index + 4]);
                printf("\nHere are some key words to kick start your songwriting!\n");
                printf("Echo, Whisper, Journey, Flicker, Serenity, Unravel, Rewind, Ember, Wander, Faded, Velvet\n");
                printf("======================================================\n");
                printf("Thanks for using our chord progression generator!\n");


            }else{
                if (index==-1){
                    printf("Invalid key. Please choose from the list.\n");

                }else{
                    printf("Error: not enough chords to create the progression. Try again. \n");

                }
                printf("To change the chord into a more complex one, use our generator's other options! (exit) \n");
            } 

           return 0;

        }


    }

    return 0;
}