我的代码如下:
#include <conio.h>
#include <stdio.h>
#include <stdlib.h>
int natural_minor_scale [8] = {0, 2, 3, 5, 7, 8, 10, 12}; /* The Natural Minor scale we will be using in the code*/
int harmonic_minor_scale [8] = {0, 2, 3, 5, 7, 8, 11, 12}; /* The Harmonic Minor scale we will be using in the code*/
int major_scale [8] = {0, 2, 4, 5, 7, 9, 11, 12}; /* The Major scale we will be using in the code*/
int scale(void);
int key(void);
void welcome_screen(void);
struct musical_choice /* Building of a structure taken from lecture notes 6.Structures */
{ /* from http://www.elec.york.ac.uk/internal_web//meng/yr1/modules/Maths_and_Programming/CProgramming/c-lecture6.pdf */
int decision;
int scale;
int key;
};
struct musical_choice choice; /*We will use a structure to get information easier here */
int main(void)
{
welcome_screen(); /* Open the Console and display the first message, so as to introduce the program to the user and to wish the user a nice day*/
scanf("%i", &choice.decision);
while(choice.decision!=1 && choice.decision!=2){ /* To choose between just 1 and 2 */
printf("\nPlease, select one of the options offered above.\n");
scanf("%i", &choice.decision);
}
if (choice.decision==1){
scale();
key();
printf("I will now play what you wish");
playing(choice.scale, choice.key);
}
else if (choice.decision==2){
choice.scale=random_number(1, 3);
choice.key=random_number(1, 3);
}
return 0;
}
void (welcome_screen()) /* This is the function for the welcoming screen */
{
printf("Welcome to this new piece of software. \nIt will help you decide what you want me, your Software Guitarist, to play. \nHave a nice day!\nFor me to play based on your desires, press 1.\nIf you would like me to prove my talent and improvise, press 2\n");
}
int scale(void) /* Receive input for which scale you want to have played */
{
printf("\nPress a number to choose whether you want me to play in:\nThe Major Scale, which requires you to press 1;\nThe Natural Minor scale, which requires you to press 2;\nThe Harmonic Minor scale, which requires you to press 3;\n");
scanf("%i", &choice.scale);
while(choice.scale != 1 && choice.scale != 2 && choice.scale != 3){ /* This command makes it so that you can't choose a letter or a number higher than 3 or lower than 1 */
printf("\nPlease, pick a number between 1 and 3.\n");
scanf("%i", &choice.scale);
}
return choice.scale;
}
int key(void) /* Receive input for which key you want to have played */
{
printf("\nNow choose between the music being played in\nThe key of A for which you press 1 \nThe key of C for which you press 2 \nThe key of E for which you press 3.\n");
scanf("%i", &choice.key);
while(choice.key != 1 && choice.key !=2 && choice.key !=3){
printf("\nPlease, pick a number between 1 and 3.\n");
scanf("%i", &choice.key);
}
return choice.key;
}
int playing (scale, key){
int key_note;
int scale_chosen;
int velocity = random_number (60-110);
if (choice.scale=1){
scale_chosen=major_scale;}
else if (choice.scale=2){
scale_chosen=natural_minor_scale;}
else if (choice.scale=3){
scale_chosen=harmonic_minor_scale;}
if (choice.key=1){
key_note=57;}
else if (choice.key=2){
key_note=60;}
else if (choice.key=3){
key_note=64;}
do{
midi_note(key_note+scale_chosen, 26, velocity); }
while (kbhit()==0);
return 0;
}
关于我设置的选项的选择似乎一切正常,但是没有播放 midi 音符。
我可能哪里出错了?如果这真的很愚蠢,我真诚地道歉,因为我还没睡,现在这对我来说真的很累。
谢谢大家的宝贵时间!
最佳答案
playing (scale, key)
函数中的 if 条件错误,拼写错误 ==
例如:
if (choice.scale=1){
// ^ ?? it should be ==
应该是:
if (choice.scale == 1){
此外,学习Indenting C Programs .
关于c - 用 C midi 编程,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/21107814/