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Added file reading

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Win 2024-08-29 10:57:19 +07:00
parent 482aad14f4
commit 32f7ae0007
2 changed files with 22 additions and 7 deletions
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vendorInfo
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vendorInfo.c
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@ -12,34 +12,49 @@
int read_input(char str[], int n); int read_input(char str[], int n);
struct vendor_item { struct vendor_item
{
char vendor_name[20]; char vendor_name[20];
char merchandise[15]; char merchandise[15];
int inventory_count; int inventory_count;
int item_price_baht; int item_price_baht;
} vendors[MAX_VENDORS]; } vendors[MAX_VENDORS];
int main() { int main()
{
char file_name[MAX_FILENAME_LENGTH]; char file_name[MAX_FILENAME_LENGTH];
read_input(file_name, MAX_FILENAME_LENGTH); read_input(file_name, MAX_FILENAME_LENGTH);
FILE *fp; FILE *fp;
if ((fp = fopen(file_name, "r")) == NULL) { if ((fp = fopen(file_name, "r")) == NULL)
{
printf("%s cannot be opened.\n", file_name); printf("%s cannot be opened.\n", file_name);
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
// calculate file size
fseek(fp, 0, SEEK_END);
unsigned long file_size = ftell(fp);
fseek(fp, 0, SEEK_SET);
char *file_buffer = (char *) malloc(file_size);
fread(file_buffer, file_size, 1, fp);
printf("%s", file_buffer);
fclose(fp); fclose(fp);
free(file_buffer);
return 0; return 0;
}; };
int read_input(char str[], int n) { int read_input(char str[], int n)
{
int ch, i = 0; int ch, i = 0;
while ((ch = getchar()) != '\n') { while ((ch = getchar()) != '\n')
if (i < n) { {
if (i < n)
{
str[i++] = ch; str[i++] = ch;
} }
} }