输入时用后缀，开头空格

#include <easyx.h>
#include <stdio.h>
#define PI 3.141592653589793
#define E  2.718281828459045
#define K  (1.0 / 256.0)
#define K_1 256.0
//#define LINE//决定函数是用线画还是用点画
struct C {double i;double r;C operator = (C n) {i = n.i; r = n.r;return C({ i, r });}C operator + (C n) {return C({ i + n.i, r + n.r });}C operator - (C n) {return C({ i - n.i, r - n.r });}C operator * (C n) {return C({ r * n.i + i * n.r, r * n.r - i * n.i});}C operator / (C n) {return C({(i * n.r - r * n.i) / (n.i * n.i - n.r * n.r),(i * n.i + r * n.r) / (n.i * n.i - n.r * n.r)});}void print() {printf("%lfi%+lf", i, r);}
};
int top = 0;
int len = 0;
int p[4096][2];
char str[512];
C stack[512];
void getnum(int l) {bool k = false;double x = 1.0;stack[top] = C({ 0, 0 });for (int i = l; str[i] != ' ' && str[i] != '\0'; i++) {if (k) x *= 10;if (str[i] != '.')stack[top] = stack[top] * C({ 0, 10 }) + C({ 0, double(str[i] - '0') });else k = true;}stack[top] = stack[top] / C({ 0, x });top++;
}
void del(C c) {for (int i = 0; str[i] != '\0'; i++) {if (str[i] == ' ') {i++;if (str[i] >= '0' && str[i] <= '9')getnum(i);if (str[i] == 'e')stack[top++] = C({ 0, E });if (str[i] == 'x')stack[top++] = c;if (str[i] == '+') {top--;stack[top - 1] = stack[top - 1] + stack[top];}if (str[i] == '-') {top--;stack[top - 1] = stack[top - 1] - stack[top];}if (str[i] == '*') {top--;stack[top - 1] = stack[top - 1] * stack[top];}if (str[i] == '/') {top--;stack[top - 1] = stack[top - 1] / stack[top];}}}p[len][0] = 512 + int(stack[0].r * K_1 + 0.5);p[len][1] = 512 - int(stack[0].i * K_1 + 0.5);
#ifndef LINEputpixel(p[len][0], p[len][1], RGB(0, 255, 255));
#endiflen++;
}
int main() {initgraph(1024, 1024, EX_SHOWCONSOLE);setlinecolor(RGB(0, 255, 255));gets_s<512>(str);for (int y = -1024; y < 1024; y += 16) {len = 0;for (int x = -1024; x < 1024; x += 1) {top = 0;C c = { y * K, x * K };del(c);}
#ifdef LINEfor (int i = 0; i < len - 1; i++) {line(p[i][0], p[i][1], p[i + 1][0], p[i + 1][1]);}
#endif}for (int y = -1024; y < 1024; y += 16) {len = 0;for (int x = -1024; x < 1024; x += 1) {top = 0;C c = { x * K, y * K };del(c);}
#ifdef LINEfor (int i = 0; i < len - 1; i++) {line(p[i][0], p[i][1], p[i + 1][0], p[i + 1][1]);}
#endif}printf("%d", getchar());saveimage(L"1.jpg");closegraph();
}