今天小编来分享一下void自定义函数
![](https://img-blog.csdnimg.cn/img_convert/d51d95131f73fd7aad159339fd31da60.png)
注意:void自定义函数无返回值
1、有输入值的void自定义函数
格式:
void 函数名(数据类型 变量名){
语句;
}
例如:一个可以控制输出字符颜色的自定义函数
void Color (int a) {
if (a == 0 || a == 14 || a == 20) {
SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE),
FOREGROUND_INTENSITY|FOREGROUND_RED|FOREGROUND_GREEN|FOREGROUND_BLUE);
} else if (a == 1 || a == 12) {
SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE),
FOREGROUND_INTENSITY|FOREGROUND_GREEN|FOREGROUND_BLUE);
} else if (a == 2) {
SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE),
FOREGROUND_INTENSITY|FOREGROUND_GREEN);
} else if (a == 3) {
SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE),
FOREGROUND_INTENSITY|FOREGROUND_RED|FOREGROUND_BLUE);
} else if (a == 4 || a == 11) {
SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE),
FOREGROUND_INTENSITY|FOREGROUND_RED);
} else if (a == 5 || a == 13) {
SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE),
FOREGROUND_INTENSITY|FOREGROUND_RED|FOREGROUND_GREEN);
} else if (a == 7) {
SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE),
FOREGROUND_GREEN|FOREGROUND_BLUE);
} else if (a == 15) {
SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), FOREGROUND_INTENSITY);
} else if (a == 16) {
SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), FOREGROUND_GREEN);
} else if (a == 17) {
SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), FOREGROUND_RED);
} else if (a == 8) {
SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), FOREGROUND_RED|FOREGROUND_GREEN|FOREGROUND_BLUE);
} else if (a == 6) {
SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE),
FOREGROUND_INTENSITY|FOREGROUND_BLUE);
} else if (a == 9) {
SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE),
FOREGROUND_INTENSITY|FOREGROUND_RED|BACKGROUND_RED|BACKGROUND_GREEN);
}
}
2、无输入值的自定义函数
格式:
void 函数名(void){
语句;
}
例如:
void Hallo_World(void){
cout<<"Hallo world";
}
不要看这个只是输出一句话,反而会使代码变得繁琐,可是如果是一个很繁琐的函数,且在项目中需要多次使用,就需要用到了,例:
float f(float x, float y, float z) {
float a = x * x + 9.0f / 4.0f * y * y + z * z - 1;
return a * a * a - x * x * z * z * z - 9.0f / 80.0f * y * y * z * z * z;
}
float h(float x, float z) {
for (float y = 1.0f; y >= 0.0f; y -= 0.001f)
if (f(x, y, z) <= 0.0f)
return y;
return 0.0f;
}
void heart_jumping(void) {
system("cls");
system("Color 04");
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),0x0C);
HANDLE o = GetStdHandle(STD_OUTPUT_HANDLE);
_TCHAR buffer[25][80] = { _T(' ') };
_TCHAR ramp[] = _T(".:-=+*#%@");
int count= 0;
int count1=0;
system("color F4");
for (float t = 0.0f;; t += 0.1f) {
int sy = 0;
float s = sinf(t);
float a = s * s * s * s * 0.2f;
for (float z = 1.3f; z > -1.2f; z -= 0.1f) {
_TCHAR* p = &buffer[sy++][0];
float tz = z * (1.2f - a);
for (float x = -1.5f; x < 1.5f; x += 0.05f) {
float tx = x * (1.2f + a);
float v = f(tx, 0.0f, tz);
if (v <= 0.0f) {
float y0 = h(tx, tz);
float ny = 0.01f;
float nx = h(tx + ny, tz) - y0;
float nz = h(tx, tz + ny) - y0;
float nd = 1.0f / sqrtf(nx * nx + ny * ny + nz * nz);
float d = (nx + ny - nz) * nd * 0.5f + 0.5f;
*p++ = ramp[(int)(d * 5.0f)];
}
else
*p++ = ' ';
}
}
for (sy = 0; sy < 25; sy++) {
COORD coord = { 0, sy };
SetConsoleCursorPosition(o, coord);
WriteConsole(o, buffer[sy], 79, NULL, 0);
}
if(count <= 10){
count++;
} else{
count++;
if(count>=20){
count =0;
}
}
Sleep(33);
}
}
这是一个跳动的爱心
以上就是本次的知识分享啦~
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