夥計!所以我有一個任務來創建一個結構,該結構包含基於我需要存儲哪些信息的變量,並提供調用不同功能並執行不同操作的菜單。問題在於,由於某種原因,我的createFile函數根本無法工作,而且我一直在尋找2天的錯誤,並且我根本無法找到它來自哪裏。控制檯應用程序菜單不工作在C
忽略changeStud函數,因爲我仍在處理它。我只是想爲我輸入名稱時創建我的文件,然後選擇該函數的編號。 (在我的情況>輸入文件名>輸入1>它只是循環菜單功能,它應該創建一個文件)
#define _CRT_SECURE_NO_WARNINGS
#include "stdafx.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
struct Student {
char ime[50];
char fn[10];
int ocfiz, ocmat, ocpro;
};
char filename[20];
FILE *fd;
Student ps;
void createFile() {
fd = fopen(filename, "wb");
fclose(fd);
printf("File created!\n");
}
void readStud(Student *s) {
printf("Enter data for new student");
getchar();
printf("Enter student name:");
gets_s(s->ime);
printf("\nEnter FN:");
scanf_s("%s", s->fn);
printf("\nEnter marks for Maths, Programming, Physics");
scanf_s("%d %d %d", &s->ocmat, &s->ocpro, &s->ocfiz);
getchar();
}
void addStud() {
fd = fopen(filename, "a+b");
char c;
do {
readStud(&ps);
fwrite(&ps, sizeof(ps), 1, fd);
printf("More Students? (y/n) : ");
c = getchar(); getchar();
} while (c == 'y');
fclose(fd);
}
void writeAllStud() {
fd = fopen(filename, "rb");
printf("students in file\n");
fread(&ps, sizeof(ps), 1, fd);
while (!feof(fd)) {
printf("%s fn: %s ocmat: %d ocpro: %d ocfiz: %d", ps.ime, ps.fn, ps.ocmat, ps.ocpro, ps.ocfiz);
fread(&ps, sizeof(ps), 1, fd);
}
fclose(fd);
}/*
void changeStud() {
char fn2[50];
printf("enter FN:");
gets_s(fn2);
fd = fopen(filename, "r+b");
fread(&ps, sizeof(ps), 1, fd);
while (!feof(fd)) {
if (strcmp(ps.fn, fn2)==0) {
fseek(fd, -(long) sizeof(ps), SEEK_CUR);
fwrite(&ps, sizeof(ps, 1, fd));
break;
}
}
}*/
void Avg() {
}
void exportData() {
FILE *txt;
txt = fopen("students.txt", "wt");
fd = fopen(filename, "rb");
fread(&ps, sizeof(ps), 1, fd);
while (!feof(fd)) {
fprintf(txt, "%s %s marks fiz%d mat%d prog%d\n", ps.fn, ps.ime, ps.ocfiz, ps.ocmat, ps.ocpro);
fread(&ps, sizeof(ps), 1, fd);
}
fclose(fd);
fclose(txt);
printf("students have been written to a text file.\n");
}
void main() {
printf("Enter file name:");
gets_s(filename);
int c;
do {
printf("\nMenu:\n");
printf("0 Exit\n");
printf("1 Create file\n");
printf("2 Add new student data\n");
printf("3 Change data from FN\n");
printf("4 AVG marks for maths, programming, physics\n");
printf("5 export all AVG marks to .txt file\n");
scanf("%d", &c);
switch (c) {
case 1: createFile; break;
case 2: addStud; break;
//case 3: changeStud; break;
case 4: Avg; break;
case 5: exportData; break;
}
} while (c != 0);
}
「我的'createFile'函數不工作」 - 究竟是什麼不工作? –
關於半相關說明:不要使用'void main'。它是'int main' – UnholySheep
這正是我無法弄清楚的。代碼方面,這是正確的。這是我試過的輸入。輸入名稱後,然後輸入「1」,它應顯示「文件已創建」,我應該看到我在解決方案的文件夾中存檔。問題是它只是循環。當我給他們打電話時,其他功能也一樣。 這是一個例子 - http://i.imgur.com/zl4UkzR.png –