[C] When I try to run, it didn't show any thing

1 
void modifyMenu()
{
	int i = 0, j, found = 0;
	int select=0;
	char inputID[20];
	char input;
	struct Menu fo[100];

	FILE *fp;
	fp = fopen("foodMenu.txt", "r");
	if (fp == NULL)
	{
		printf("Unable to open the file\n");
		exit(-1);
	}
	else
	{
		while (fscanf(fp, "%[^|]|%[^|]|%[^|]|%[^|]|%f\n", &fo[i].foodID, &fo[i].category, &fo[i].foodName, &fo[i].foodDescription, &fo[i].foodPrices) != EOF)
			i++;
	}
	fclose(fp);
	system("cls");
	printf("Modify Menu\n");
	printf("====================================\n");
	printf("Please enter the food in menu you want to modify :\n");
	rewind(stdin);
	scanf("%s", &inputID);
	for (j = 0; j < i; j++)
		if (strcmp(fo[j].foodID, strupr(inputID))==0)
		{
			system("cls");
			printf("Modify\n");
			printf("FOOD ID:%s\n", inputID);
			rewind(stdin);
			printf("Enter the food category:\n");
			scanf("%s", &fo[j].category);	
			rewind(stdin);
			printf("Enter the food name:\n");
			scanf("%s", &fo[j].foodName);
			rewind(stdin);
			printf("Enter the food description:\n");
			scanf("%s", &fo[j].foodDescription);
			rewind(stdin);
			printf("Enter the food prices:\n");
			scanf("%f", &fo[j].foodPrices);
			rewind(stdin);
			found++;
			printf("Modify done\n");
		}

	fp = fopen("foodMenu.txt", "w");
	for (j = 0; j < i; j++) {
		fprintf(fp, "%[^|]|%[^|]|%[^|]|%[^|]|%.2f\n", &fo[j].foodID, &fo[j].category, &fo[j].foodName, &fo[j].foodDescription, &fo[j].foodPrices);
	}
	fclose(fp);
	if (found == 0)
		printf("This ID is not avaiable\n");

	system("pause");
	do {
		system("cls");
		printf("Do you want to proceed again ?(Y/N)");
		rewind(stdin);
		scanf("%c", &input);
		if (input == 'N' || input == 'n')
		{
			do {
				home();
			} while (select != 1 || select != 2 || select != 3 || select != 4 || select != 5);

		}
		else if (input == 'Y' || input == 'y')
			break;
		else
			printf("Error input!!\nPlease enter again!!!!\n");
	} while (input != 'Y' || input != 'y' || input != 'N' || input != 'n');
}
2

You’re missing some crucial information here, which is why it’s hard to get help because things won’t compile for us anyway.

We need info like the libraries you included.

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

struct Menu fo[100]; // NOT IN CODE.

if (strcmp(fo[j].foodID, strupr(inputID)==0)) // PROBLEM WITH strupr() that needs to be looked at

home(); // NOT IN CODE.