Use fscanf to read text files

Fscanf is a c api for reading text files. It features formatting and reading of file content.

1 FILE* pf = fopen("c:\\hello.txt", "r");
2  if (NULL==pf)
3      return;
4 
5  char cstr[256];
6 fscanf(pf, "%s", cstr);
7 fclose(pf);

Fscanf uses spaces, tabs, and carriage returns to separate different words, making it easier to use.

Fscanf is encapsulated to search for target characters, read strings, integers, and double-precision floating point numbers.

 1 #pragma once 
 2 #pragma warning (disable:4996)
 3 
 4 inline bool HitFlag(FILE* pf, const char* flag)
 5 {
 6     char chs[256];
 7     while (!feof(pf))
 8     {
 9         fscanf(pf, "%s", chs);
10         if (0==strcmp(flag, chs))
11             return true;
12     }
13 
14     return false;
15 }
16 
17 inline std::string ReadStrVal(FILE* pf)
18 {
19     char chs[256];
20     fscanf(pf, "%s", chs);
21     return std::string(chs);
22 }
23 
24 inline int ReadIntVal(FILE* pf)
25 {
26     int iVal;
27     fscanf(pf, "%d", &iVal);
28     return iVal;
29 }
30 
31 inline double ReadDblVal(FILE* pf)
32 {
33     double fVal;
34     fscanf(pf, "%lf", &fVal);
35     return fVal;
36 }