diff --git a/main.c b/main.c
new file mode 100644
index 0000000..6e297fc
--- /dev/null
+++ b/main.c
@@ -0,0 +1,151 @@
+//
+//  main.c
+//  CalculateTrainer
+//
+//  Created by Eric on 16-4-23.
+//  Copyright (c) 2016年 Bakantu Eric. All rights reserved.
+//
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+
+int main(int argc, const char * argv[]) {
+    int i;
+    int sign[4] = {0, 0, 0, 0},f_num,s_num,input_num,q_num,max,p_sign;
+    int right = 0, wrong = 0;
+    int sign_right[4] = {0, 0, 0, 0},sign_question[4] = {0, 0, 0, 0};
+    double aver_time = 0;
+    time_t start = 0,end;
+    char ch;
+    srand((unsigned int)time(NULL));
+    system("clear");
+    printf("=======================================================================\n");
+    printf("      Wellcome to Calculate Trainer(BY Eric.Bakantu 2016.4.23).\n");
+    printf("                            V 1.0.0\n");
+    printf("=======================================================================\n");
+    while (1){
+        printf("Let's start a calculate training.\n");
+        printf("#How many question(s): ");
+        scanf("%d",&q_num);
+        printf("#Which sign(0.+ 1.- 2.* 3./ q to end): ");
+        while((ch = getchar()) != 'q'){
+            sign[ch-48] = 1;
+        }
+        printf("#MAX NUM: ");
+        scanf("%d",&max);
+        system("clear");
+        for (i = 0; i < q_num; i++){
+            printf("------------[R %d]--[%d of %d]--[W %d]-----------\n",right,i+1,q_num,wrong);
+            while (sign[(p_sign = rand()%4)] == 0);
+            f_num = rand()%max;
+            usleep(1000);
+            s_num = rand()%max;
+            if (p_sign == 0){
+                printf("%d + %d = ",f_num,s_num);
+                start = time(NULL);
+                scanf("%d",&input_num);
+                end = time(NULL);
+                sign_question[0]++;
+                if (input_num == f_num+s_num) {
+                    printf("----------------------------------------------\n");
+                    printf("#RESULT : √\n");
+                    right++;
+                    sign_right[0]++;
+                }
+                else {
+                    printf("----------------------------------------------\n");
+                    printf("#RESULT : ×\n");
+                    printf("RRIGHT ANSWER: %d\n",f_num+s_num);
+                    wrong++;
+                    usleep((unsigned int)1000000);
+                }
+                aver_time += difftime(end,start);
+                printf("$TIME : %.0fs\n",difftime(end,start));
+            }
+            if (p_sign == 1){
+                printf("%d - %d = ",f_num,s_num);
+                start = time(NULL);
+                scanf("%d",&input_num);
+                end = time(NULL);
+                sign_question[1]++;
+                if (input_num == f_num-s_num) {
+                    printf("----------------------------------------------\n");
+                    printf("#RESULT : √\n");
+                    right++;
+                    sign_right[1]++;
+                }
+                else {
+                    printf("----------------------------------------------\n");
+                    printf("#RESULT : ×\n");
+                    printf("RRIGHT ANSWER: %d\n",f_num-s_num);
+                    wrong++;
+                    usleep((unsigned int)1000000);
+                }
+                aver_time += difftime(end,start);
+                printf("$TIME : %.0fs\n",difftime(end,start));
+            }
+            if (p_sign == 2){
+                printf("%d * %d = ",f_num,s_num);
+                start = time(NULL);
+                scanf("%d",&input_num);
+                end = time(NULL);
+                sign_question[2]++;
+                if (input_num == f_num*s_num) {
+                    printf("----------------------------------------------\n");
+                    printf("#RESULT : √\n");
+                    right++;
+                    sign_right[2]++;
+                }
+                else {
+                    printf("-------------------------------------------------\n");
+                    printf("#RESULT : ×\n");
+                    printf("RRIGHT ANSWER: %d\n",f_num*s_num);
+                    wrong++;
+                    usleep((unsigned int)1000000);
+                }
+                aver_time += difftime(end,start);
+                printf("$TIME : %.0fs\n",difftime(end,start));
+            }
+            if (p_sign == 3){
+                printf("%d / %d = ",f_num*s_num,s_num);
+                start = time(NULL);
+                scanf("%d",&input_num);
+                end = time(NULL);
+                sign_question[3]++;
+                if (input_num == f_num) {
+                    printf("----------------------------------------------\n");
+                    printf("#RESULT : √\n");
+                    right++;
+                    sign_right[3]++;
+                }
+                else {
+                    printf("----------------------------------------------\n");
+                    printf("#RESULT : ×\n");
+                    printf("RRIGHT ANSWER: %d\n",f_num);
+                    wrong++;
+                    usleep(800000);
+                }
+                aver_time += difftime(end,start);
+                printf("$TIME : %.2fs\n",difftime(end,start));
+            }
+            usleep(800000);
+            system("clear");
+        }
+        printf("------------------------------------[RESULT]-------------------------------------\n");
+        printf("[ RAW: %.2lf %% ] [ +: %.2lf %% ] [ -: %.2lf %% ] [ *: %.2lf %% ] [ /:%.2lf %% ]\n",\
+               (double)right/q_num*100,\
+               sign_question[0] == 0 ? -1 : (double)sign_right[0]/sign_question[0]*100,\
+               sign_question[1] == 0 ? -1 : (double)sign_right[1]/sign_question[1]*100,\
+               sign_question[2] == 0 ? -1 : (double)sign_right[2]/sign_question[2]*100,\
+               sign_question[3] == 0 ? -1 : (double)sign_right[3]/sign_question[3]*100);
+        printf("Average Time : %.2f\n",aver_time/q_num);
+        printf("------------------------------------[RESULT]-------------------------------------\n");
+        printf("Press any key to start the next training...");
+        getchar();
+        getchar();
+        system("clear");
+    }
+    return 0;
+}