[실력 키우기-2046] 사각형그리기2

 

 

구현 코드:

 

#include <stdio.h> #include <stdlib.h> #include <string.h>   #define OUT_FILE_NAME "output.txt" #define INPUT_FILE_NAME "input.txt"   void ReadInput(int *len, int *type); void WriteOutput(char *text); void RemoveOutput();   void ProcType1(int len); void ProcType2(int len); void ProcType3(int len);     int main() {           int len =0, type=0;             void (*ProcTypeFn[4])(int);           ProcTypeFn[1] = ProcType1;           ProcTypeFn[2] = ProcType2;           ProcTypeFn[3] = ProcType3;                 RemoveOutput();           ReadInput(&len, &type);             ProcTypeFn[type](len);                     return 0; }   void ProcType1(int len) {           //한변의 길이 len인 정사각형을 아래와 같이 출력           //1 1 1 1 1           //2 2 2 2 2           //3 3 3 3 3           //4 4 4 4 4           //5 5 5 5 5           int i=0, j=0;           char text[20] = {0};           for(i=1;i<=len;i++)           {                     for(j=1;j<=len;j++)                     {                                sprintf(text, "%d ", i);                                WriteOutput(text);                     }                     WriteOutput("\n");           } }   void ProcType2(int len) {           //한변의 길이 len인 정사각형을 아래와 같이 출력           //1 2 3 4 5           //5 4 3 2 1           //1 2 3 4 5           //5 4 3 2 1           //1 2 3 4 5           int i=0, j=0;           int direction = 1;           char text[20] = {0};           for(i=1;i<=len;i++)           {                     if(direction)                     {                                for(j=1;j<=len;j++)                                {                                          sprintf(text, "%d ", j);                                          WriteOutput(text);                                }                     }                     else                     {                                for(j=len;j>0;j--)                                {                                          sprintf(text, "%d ", j);                                          WriteOutput(text);                                }                     }                                         direction = direction==1 ? 0 : 1;                       WriteOutput("\n");           } } void ProcType3(int len) {           //한변의 길이 len인 정사각형을 아래와 같이 출력           //1 2 3 4 5           //2 4 6 8 10           //3 6 9 12 15           //4 8 12 16 20           //5 10 1 20 25           int i=0, j=0;           int num = 0;           char text[20] = {0};             for(i=1;i<=len;i++)           {                     num = i;                     for(j=1;j<=len;j++)                     {                                sprintf(text, "%d ", num);                                WriteOutput(text);                                num = num + i;                     }                     WriteOutput("\n");           } }   void RemoveOutput() {           unlink(OUT_FILE_NAME); }   void WriteOutput(char *text) {           FILE* fs;           char *res=0;           fs=fopen(OUT_FILE_NAME,"a");           if(fs)           {                     while(*text != '\0')                     {                                fwrite(text, 1, 1, fs);                                text++;                     }                                         fclose(fs);           } } void ReadInput(int *len, int *type) {           FILE* fs;           char data[100]={0};           char *res=0;           fs=fopen(INPUT_FILE_NAME,"r");           if(fs)           {                     fread(data, sizeof(char),5,fs);                     *len = atoi(strtok(data, " "));                     *type = atoi(strtok(0, " "));                     fclose(fs);           } }