コード:

// strcmp.c
#include <stdio.h>
#include <time.h>
//-------------------------------------------------------------------------
unsigned int internal_strlen(const char *s) 
{
  unsigned int i = 0;
  while (s[i])
    i++;
  return i;
}
//-------------------------------------------------------------------------
int internal_strcmp(const char *s1, const char *s2)
{
  while (1) {
    unsigned c1 = *s1;
    unsigned c2 = *s2;
    if (c1 != c2) 
      return (c1 < c2) ? -1 : 1;
    if (c1 == 0)
      break;
    s1++;
    s2++;
  }
  return 0;
}
//-------------------------------------------------------------------------
int main(void)
{
  char *a = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
  char *b = "bcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
  char *c = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ012345678";
  // strlen cmpare a b
  clock_t strlen_start = clock();
  size_t a_len = internal_strlen(a);
  size_t b_len = internal_strlen(b);
  if (a_len == b_len)
    fprintf(stdout, "strlen a_string = b_string\n");
  else  
    fprintf(stdout, "strlen a_string != b_string\n");
  clock_t strlen_stop = clock();
  fprintf(stdout, "strlen_exec_time %.6lf\n",
          (double)(strlen_stop - strlen_start) / CLOCKS_PER_SEC);
  // strcmp a b
  clock_t strcmp_start = clock();
  if (internal_strcmp(a, b) == 0)
    fprintf(stdout, "strcmp a_string = b_string\n");
  else
    fprintf(stdout, "strcmp a_string != b_string\n");
  clock_t strcmp_stop = clock();
  fprintf(stdout, "strcmp_exec_time %.6lf\n",
          (double)(strcmp_stop - strcmp_start) / CLOCKS_PER_SEC);
  // strcmp a c
  clock_t strcmp_start2 = clock();
  if (internal_strcmp(a, c) == 0)
    fprintf(stdout, "strcmp2 a_string = b_string\n");
  else
    fprintf(stdout, "strcmp2 a_string != b_string\n");
  clock_t strcmp_stop2 = clock();
  fprintf(stdout, "strcmp2_exec_time %.6lf\n",
          (double)(strcmp_stop2 - strcmp_start2) / CLOCKS_PER_SEC);
  return 0;
}

コード:

strlen a_string != b_string
strlen_exec_time 0.000114
strcmp a_string != b_string
strcmp_exec_time 0.000001
strcmp2 a_string != b_string
strcmp2_exec_time 0.000002

コード:

while(...)
  size_t len_o = strlen(origin_word);
  size_t len_h = strlen(h_word);
  if ((len_o != len_h) continue;
  if (strncmp(origin_word, h_word, len_o) != 0)) continue;
  ... // 処理
}

コード:

double comparison_new_happy_file(char word[30],double happy)
{
	FILE *fp;
	char h_word[30];
	char str[50];
	double new_happy;
	fp = File_check("New_happy.txt","r");
	while (fscanf_s(fp, "%s %lf", h_word, &new_happy,sizeof(str)) == NULL) {
		if (strstr(word, h_word) != NULL) {
			if (origin_word == h_word) {
				strcpy_s(origin_word,word);
			}
			break;
		}
	}
	fclose(fp);
	return(new_happy);
}

コード:

41c41
< 	while (fscanf_s(fp, "%s %lf", h_word, &new_happy,sizeof(str)) == NULL) {
---
> 	while (fscanf_s(fp, "%s %lf", h_word, sizeof(h_word), &new_happy) == NULL) {
61c61
< 	while (fscanf_s(fp, "%s %lf", u_word, &new_unhappy,sizeof(str)) == NULL) {
---
> 	while (fscanf_s(fp, "%s %lf", u_word, sizeof(u_word), &new_unhappy) == NULL) {
106c106
< 	while (fscanf_s(fp, "%s,%lf,%lf", word, &happy, &unhappy,sizeof(str)) != NULL ) {
---
> 	while (fscanf_s(fp, "%s,%lf,%lf", word, sizeof(word), &happy, &unhappy) != NULL ) {
109c109
< 		File_output;
---
> 		File_output();

コード:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

char origin_word[50];
double origin_happy;
double origin_unhappy;
int old_file_flag;
int new_happy_file_flag;
int new_unhappy_file_flag;
int file_output_flag = 0;

//ファイルのチェック
FILE *File_check(const char fname[],const char mode[])
{
	FILE *fp;
	fopen_s(&fp,fname,mode);

	if(fp == NULL){
		printf("ファイルオープン失敗\n");
		exit(1);
	}
	return(fp);
}

//旧ファイルとの比較
void comparison_old_file() {

}

//新幸福ファイルとの比較
double comparison_new_happy_file(char word[30],double happy)
{
	FILE *fp;
	char h_word[30];
	char str[50];
	double new_happy;

	fp = File_check("New_happy.txt","r");

	while (fscanf_s(fp, "%s %lf", h_word, &new_happy,sizeof(str)) == NULL) {
		if (strstr(word, h_word) != NULL) {
			if (origin_word == h_word) {
				strcpy_s(origin_word,word);
			}
			break;
		}
	}
	fclose(fp);
	return(new_happy);
}
//新不幸ファイルとの比較
double comparison_new_unhappy_file(char word[30],double unhappy) {
	FILE *fp;
	char u_word[30];
	char str[50];
	double new_unhappy;

	fp = File_check("New_unhappy.txt", "r");

	while (fscanf_s(fp, "%s %lf", u_word, &new_unhappy,sizeof(str)) == NULL) {
		if (strstr(word, u_word) != NULL) {
			if (origin_word == u_word) {
				strcpy_s(origin_word, word);
			}
			break;
		}
	}
	fclose(fp);
	return(new_unhappy);
}

//ファイルの書き込み
void File_output(void) 
{
	FILE *fp;
	const char *file = "/*個人情報のため隠します。*/";

	if (file_output_flag == 0) {
		fp = File_check(file,"w");
		fprintf_s(fp,origin_word,origin_happy,origin_unhappy);
		file_output_flag = 1;
		printf("保存できました\n");
	}
	else {
		fp = File_check(file,"a");
		fprintf_s(fp,origin_word,origin_happy,origin_unhappy);
	}

	fclose(fp);

}


//古いファイルと新しいファイルの比較
void old_and_new()
{
	FILE *fp;
	char word[30];
	char str[80];
	double happy;
	double unhappy;

	fp = File_check("social_evaluation.txt","r");

	while (fscanf_s(fp, "%s,%lf,%lf", word, &happy, &unhappy,sizeof(str)) != NULL ) {
		origin_happy = comparison_new_happy_file(word,happy);
		origin_unhappy = comparison_new_unhappy_file(word,unhappy);
		File_output;
	}
	fclose(fp);
}

int main(void)
{
	old_and_new();

	return 0;
}