fo_test.c

cygwin下的包含各种c基本操作的demo程序

//----------------------------------------------------------------
// the file operation test file
//----------------------------------------------------------------
#include "my_common.h"
#ifdef __cplusplus
extern "C"
#endif

char* fo_test()
{   
	  FILE *fd;
	  int ii = 0;
	  int jj = 3;
	  int c;
	  //char aa[100] ;//= {'a','b','c','d',0};
	  char *aa = malloc(100);
	  //char *bb = "efgh";
	  if(aa == NULL)
	  return NULL;
	  
    if ( (fd = fopen("fo.txt","r")) == -1)
    {  return NULL;}
    
    while ((c = fgetc(fd)) != EOF)
    //while(jj--)
    {
    	  //printf("%d ",c);
        aa[ii++] =c;// fgetc(fd);
        	
    }
    printf("\n");
    aa[ii]=0;
    
    //*aa="abcde";
    printf("the string read from fo.txt are: \n%s \n",aa);
    return aa;
    	
}