真正实现C语言绘制数学函数图像.doc

用C语言画函数图像横纵坐标单位长度比校正（3:5）真正的余弦函数#include#includeint sishewuru(float a);void main()int n = 450;float a500, b500;int i,j;a0 = b0 = 0;for (i = 1; i n; i+)ai = ai - 1 + 0.01;bi = cos(ai);int A500,B500;for (i = 0; i =0; i-)for ( j = 0; j n; j+)if (i=Bj)printf(*);elseprintf( );printf(n);int sishewuru(float a)int m;if (a-floor(a)0.5)m = a;return m;elsem = a + 1;return m;程序优化1. 调节输出框大小，字符显示大小2. 确定函数的定义域3. 确定定义域上的步长4. 计算函数值5. 确定函数值放大系数6. 确定定义域恰好落在显示的区间内7. 确定坐标的单位长度与字符实际长度之间的换算关系8. 确定打点的顺序与坐标的关系定义域在的正弦函数图像定义域在的正切函数图像定义域在的倒正切函数图像#include#includeint sishewuru(float a);void main()float minx = -2*3.14,maxx = 2*3.14,dx,x500,y500,k;/确定定义区间int lx = 500, i,j, Y500;dx = (maxx - minx) / 450;x0 = minx;y0 = 0.1 / sin(x1);for (i = 1; i lx; i+)xi = xi - 1 + dx;yi =0.1/sin(xi);k = 0.6/ dx;/扩大系数for (i = 0; i lx; i+)Yi = sishewuru(k*yi);/printf(%dn, Yi);for (i = 0; i 130; i+)for (j = 0; j lx; j+)if (i = -Yj+65)printf(*);elseprintf( );printf(n);int sishewuru(float a)int m;if (a-floor(a)0.5)m = a;return m;elsem = a + 1;return m;定义域在半径为的圆#include#includeint sishewuru(float a);void main()float minx = -2*3.14,maxx = 2*3.14,dx,x500,y2*500,k,r=0.5*maxx;/确定定义区间int lx = 500, i,j, Y2*500;dx = (maxx - minx) / 450;x0 = minx;y0 = 0.1 / sin(x1);for (i = 1; i lx; i+)xi = xi - 1 + dx;yi =sqrt(r*r-xi*xi);/确定函数表达式ylx + i = -1*yi;k = 0.6/ dx;/扩大系数for (i = 0; i 2*lx; i+)Yi = sishewuru(k*yi);/printf(%dn, Yi);for (i = 0; i 136; i+)for (j = 0; j lx; j+)if (i = -Yj + 68 | i = -Yj+lx + 68)printf(*);elseprintf( );printf(n);int s