我的头文件为:
test.h
//Mandatory fields size macro
#define size_uid 65
#define size_txn 33
#define size_adhaarNo 13
#define size_ver 4
#define size_input 65
#define size_photo 1024*1024*10
#define size_pseudonym 50
#define size_name 50
//Mandatory fields declaration
char uid[size_uid];
char txn[size_txn];
char adhaarNo[size_adhaarNo];
char ver [size_ver];
char *photo;
char pseudonym[size_pseudonym];
char name[size_name];
char input[size_input];
void incorrect_val_test(FILE *, FILE *, FILE *, FILE *, FILE *, FILE *,FILE *,FILE *,FILE *,FILE*);
test.c的
#include "test.h"
//Mandatory fields declaration
char uid[] = "865A80A01C70A9E0D5FC5F4D354A9155BF58CD483B1397C92614E5BC92317ACC";
char txn[] = "23da7b99-c561-4102-9df8-d37fbfe1";
char adhaarNo[] = "250241800087";
char ver [] = "1.0";
char *photo = (char *)malloc(sizeof(char)*size_photo);
char pseudonym[] = "2b6c55566d14459991513fb00bce34ed";
char name[] = "Amarjeet Sharma";
char input[] = "936a185caaa266bb9cbe981e9e05cb78cd732b0b3280eb944412bb6f8f8f07af";
void incorrect_val_test(FILE *ver, FILE *ts, FILE *txn, FILE *vtxn, FILE *uid, FILE *input, FILE *adhaarNo, FILE *photo, FILE *name, FILE *pseudonym)
{
//Some initialization and files are opened here....
photo = (char *)malloc(sizeof(char)*size_photo);
FILE *photos = fopen("./input/data.txt","r");
if(photos == NULL)
{
printf("Can't open data file.\n");
return;
}
i=0;
while((read_char = fgetc(photos))!= EOF)
{
if(read_char == '\n')
continue;
photo[i]= read_char;
i++;
}
// Some more processing done here
}
的main.c
int main()
{
// Some files are opened here to read data.
incorrect_val_test(fp_ver, fp_ts, fp_txn, fp_vtxn, fp_uid, fp_input, fp_adhaarNo, fp_photo, fp_name, fp_pseudonym);
return 0;
}
当我编译它时会出现以下错误消息
错误消息
警告:从不兼容的指针类型分配 [-Wincompatible-pointer-types]
photo =(char *)malloc(sizeof(char)* size_photo);
错误:从类型'char'分配类型'FILE {aka struct _IO_FILE}'时不兼容的类型
photo [i] = read_char;
有人能指出我哪里出错吗?
答案 0 :(得分:4)
您可以进行类似
的功能调用 char *photo = (char *)malloc(sizeof(char)*size_photo);
在功能中。 global 范围内不允许这样做。删除全局,将incorrect_val_test()
函数中的一个保留。
此外,请malloc()
C
和char *photo = NULL;
中的家人返回do not cast。
解决方案:
photo
。正如您所做的那样,将内存分配到incorrect_val_test()
内的char *photo = malloc(size_photo); //cast not required
// sizeof(char) is guranteed to be 1
,例如
FILE *photo
然后,您在函数参数列表中的incorrect_val_test()
函数中有void incorrect_val_test(..., FILE *photo, ...)
char * photo
阴影全局 void incorrect_val_test(..., FILE *photos, ...)
^
|
。
恕我直言,你想要的是写
photos = fopen("./input/data.txt","r");
,在函数体内,
photo
但是,为什么要使用带有单个字符差异的变量名?使用更冗长,易于区分的东西。
注意:使用free()
完成后,请不要忘记onclick
已分配的内存以避免内存泄漏。
答案 1 :(得分:3)
你有这个功能
void incorrect_val_test(..., FILE *photo, ...)
请注意,您有一个阴影全局变量的参数。这就是你在问题中出错的原因。