簡介

好像是4月份寫的，挺古老的了，控件交互還是在類里的好
可以退格，也可以開方，當初寫了好久，很多功能沒弄出來，可惜FLTK不支持中文（c4droid的FLTK不支持中文）

代碼

#include <FL/Fl.H> #include <FL/Fl_Window.H> #include <FL/Fl_Button.H> #include <FL/Fl_Output.H> #include <FL/fl_ask.H> #include <FL/Fl_Group.H> #include <vector> #include <sstream> #include <cmath>typedef void (*CALLBACK) (Fl_Widget * widget, void *data);enum InputNum {NUMBER1,NUMBER2,RESULT }; enum Op {OP_NONE,OP_PLUS,OP_MIN,OP_MULT,OP_DIV };int input_num = NUMBER1; double number1 = 0; double number2 = 0; double ans = 0; int op = OP_NONE;void num_add(int, void *); void updata(void *); void clear_num();void button_num_7_cb(Fl_Widget *, void *); void button_num_8_cb(Fl_Widget *, void *); void button_num_9_cb(Fl_Widget *, void *); void button_num_4_cb(Fl_Widget *, void *); void button_num_5_cb(Fl_Widget *, void *); void button_num_6_cb(Fl_Widget *, void *); void button_num_1_cb(Fl_Widget *, void *); void button_num_2_cb(Fl_Widget *, void *); void button_num_3_cb(Fl_Widget *, void *); void button_op_plus_cb(Fl_Widget *, void *); void button_op_min_cb(Fl_Widget *, void *); void button_op_mult_cb(Fl_Widget *, void *); void button_op_div_cb(Fl_Widget *, void *); void button_solve_cb(Fl_Widget *, void *); void button_clear_cb(Fl_Widget *, void *); void button_num_0_cb(Fl_Widget *, void *); void button_bs_cb(Fl_Widget *, void *); void button_sqrt_cb(Fl_Widget *, void *); void button_fun_cb(Fl_Widget *, void *);int main() {fl_message("Welcome to FLTK Calculator!\nversion:1.1.1 beta");// clear log fileFILE *f;f = fopen("log.txt", "w");fprintf(f, "");fclose(f);// windowFl_Window window(600, 800, "");window.begin();// widgetsFl_Group main(0, 200, 600, 600);main.begin();Fl_Button button_num_7(0, 400, 150, 100, "7");Fl_Button button_num_8(150, 400, 150, 100, "8");Fl_Button button_num_9(300, 400, 150, 100, "9");Fl_Button button_num_4(0, 500, 150, 100, "4");Fl_Button button_num_5(150, 500, 150, 100, "5");Fl_Button button_num_6(300, 500, 150, 100, "6");Fl_Button button_num_1(0, 600, 150, 100, "1");Fl_Button button_num_2(150, 600, 150, 100, "2");Fl_Button button_num_3(300, 600, 150, 100, "3");Fl_Output output_output(0, 0, 600, 200, "0");Fl_Button button_op_plus(450, 400, 150, 100, "+");Fl_Button button_op_min(450, 500, 150, 100, "-");Fl_Button button_op_mult(450, 600, 150, 100, "*");Fl_Button button_op_div(450, 700, 150, 100, "/");Fl_Button button_solve(300, 700, 150, 100, "=");Fl_Button button_clear(0, 300, 150, 100, "C");Fl_Button button_num_0(0, 700, 150, 100, "0");Fl_Button button_bs(450, 300, 150, 100, "BS");Fl_Button button_sqrt(0, 200, 150, 100, "SQRT");Fl_Button button_fun(300, 300, 150, 100, "FUN");main.end();std::vector < void *>widgets = {(void *)(&button_num_7),(void *)(&button_num_8),(void *)(&button_num_9),(void *)(&button_num_4),(void *)(&button_num_5),(void *)(&button_num_6),(void *)(&button_num_1),(void *)(&button_num_2),(void *)(&button_num_3),(void *)(&output_output),(void *)(&button_op_plus),(void *)(&button_op_min),(void *)(&button_op_mult),(void *)(&button_op_div),(void *)(&button_solve),(void *)(&button_clear),(void *)(&button_num_0),(void *)(&main),(void *)(&button_bs),(void *)(&button_sqrt),(void *)(&button_fun)};// widget settingbutton_num_7.labelsize(100);button_num_8.labelsize(100);button_num_9.labelsize(100);button_num_4.labelsize(100);button_num_5.labelsize(100);button_num_6.labelsize(100);button_num_1.labelsize(100);button_num_2.labelsize(100);button_num_3.labelsize(100);output_output.labelsize(50);button_op_plus.labelsize(100);button_op_min.labelsize(100);button_op_mult.labelsize(100);button_op_div.labelsize(100);button_solve.labelsize(100);button_clear.labelsize(100);button_num_0.labelsize(100);button_bs.labelsize(100);button_sqrt.labelsize(50);button_fun.labelsize(75);// callbackbutton_num_7.callback(button_num_7_cb, &widgets);button_num_8.callback(button_num_8_cb, &widgets);button_num_9.callback(button_num_9_cb, &widgets);button_num_4.callback(button_num_4_cb, &widgets);button_num_5.callback(button_num_5_cb, &widgets);button_num_6.callback(button_num_6_cb, &widgets);button_num_1.callback(button_num_1_cb, &widgets);button_num_2.callback(button_num_2_cb, &widgets);button_num_3.callback(button_num_3_cb, &widgets);button_op_plus.callback(button_op_plus_cb, &widgets);button_op_min.callback(button_op_min_cb, &widgets);button_op_mult.callback(button_op_mult_cb, &widgets);button_op_div.callback(button_op_div_cb, &widgets);button_solve.callback(button_solve_cb, &widgets);button_clear.callback(button_clear_cb, &widgets);button_num_0.callback(button_num_0_cb, &widgets);button_bs.callback(button_bs_cb, &widgets);button_sqrt.callback(button_sqrt_cb, &widgets);button_fun.callback(button_fun_cb, &widgets);window.end();// runwindow.show();return Fl::run(); }void num_add(int n, void *data) {if (input_num == NUMBER1)number1 = number1 * 10 + n;else if (input_num == NUMBER2)number2 = number2 * 10 + n;else if (input_num == RESULT){clear_num();number1 = number1 * 10 + n;input_num = NUMBER1;}updata(data); }void updata(void *data) {FILE *f;f = fopen("log.txt", "a");fprintf(f, "----------\nnumber1:%f\nnumber2:%f\nans:%f\nop:%f\n----------\n", number1, number2,ans, op);fclose(f);std::stringstream str;if (number2 == 0 && op == OP_DIV && input_num == NUMBER2)str << "Error:divisor can't be 0";else if (number1 > DBL_MAX)str << "Error:esult is too big";else if (input_num == NUMBER1)str << number1;else if (input_num == NUMBER2)str << number2;else if (input_num == RESULT)str << ans;((Fl_Output *) (((std::vector < void *>*)(data))->at(9)))->value(str.str().data()); }void clear_num() {number1 = 0;number2 = 0; }void button_num_7_cb(Fl_Widget * widget, void *data) {num_add(7, data); }void button_num_8_cb(Fl_Widget * widget, void *data) {num_add(8, data); }void button_num_9_cb(Fl_Widget * widget, void *data) {num_add(9, data); }void button_num_4_cb(Fl_Widget * widget, void *data) {num_add(4, data); }void button_num_5_cb(Fl_Widget * widget, void *data) {num_add(5, data); }void button_num_6_cb(Fl_Widget * widget, void *data) {num_add(6, data); }void button_num_1_cb(Fl_Widget * widget, void *data) {num_add(1, data); }void button_num_2_cb(Fl_Widget * widget, void *data) {num_add(2, data); }void button_num_3_cb(Fl_Widget * widget, void *data) {num_add(3, data); }void button_op_plus_cb(Fl_Widget * widget, void *data) {op = OP_PLUS;if (input_num == NUMBER2){ans = number1 + number2;number1 = ans;number2 = 0;}else if (input_num == RESULT){number1 = ans;number2 = 0;}updata(data);input_num = NUMBER2; }void button_op_min_cb(Fl_Widget * widget, void *data) {op = OP_MIN;if (input_num == NUMBER2){ans = number1 - number2;number1 = ans;}else if (input_num == RESULT){number1 = ans;number2 = 0;}updata(data);input_num = NUMBER2; }void button_op_mult_cb(Fl_Widget * widget, void *data) {op = OP_MULT;if (input_num == NUMBER2){ans = number1 * number2;number1 = ans;}else if (input_num == RESULT){number1 = ans;number2 = 0;}updata(data);input_num = NUMBER2; }void button_op_div_cb(Fl_Widget * widget, void *data) {op = OP_DIV;if (input_num == NUMBER2){ans = number1 / number2;number1 = ans;}else if (input_num == RESULT){number1 = ans;number2 = 0;}updata(data);input_num = NUMBER2; }void button_solve_cb(Fl_Widget * widget, void *data) {if (op != OP_NONE && input_num == NUMBER2){input_num = RESULT;switch (op){case OP_PLUS:ans = number1 + number2;break;case OP_MIN:ans = number1 - number2;break;case OP_MULT:ans = number1 * number2;break;case OP_DIV:ans = number1 / number2;break;}clear_num();updata(data);} }void button_clear_cb(Fl_Widget * widget, void *data) {input_num = NUMBER1;clear_num();ans = 0;updata(data); }void button_num_0_cb(Fl_Widget * widget, void *data) {num_add(0, data); }void button_bs_cb(Fl_Widget * widget, void *data) {if (input_num == NUMBER1)number1 = long (number1 / 10);else if (input_num == NUMBER2)number2 = long (number2 / 10);updata(data); }void button_sqrt_cb(Fl_Widget * widget, void *data) {if (input_num == NUMBER1)ans = sqrt(number1);else if (input_num == NUMBER2)ans = sqrt(number2);else if (input_num == RESULT)ans = sqrt(ans);clear_num();input_num = RESULT;updata(data); }void button_fun_cb(Fl_Widget * widget, void *data) {((Fl_Group*)((std::vector<void*>*)(data))->at(17))->clear_visible();}

運行效果

剛打開


輸入111

輸入+123=

sqrt

總結

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