重定向有什么问题

Question

这是我的 C 代码，它工作正常，我试图让它与 IO 重定向一起工作但失败了，无法理解这里错误的原因，我制作了测试文件 test1.in，我正在等待输出test1.out 但运行后 test1.out 为空 `

#include <stdio.h>

#define MAX_STR_SIZE 80


/*******************************************************/
int my_strcmp(char[], char[]);
int my_strncmp(char[], char[], unsigned int);
int my_strchr(char[], int);
/*******************************************************/

int main(){
    
    int test = 0, running = 1;
    
    char str1[MAX_STR_SIZE];
    char str2[MAX_STR_SIZE];
    
    char c;
    int count;
    
    printf("\nLet's start testing!");
    
    while(running){
        
        printf("\n Enter 1: to test my_strcmp(), 2: to test my_strncmp(), 3: to test my_strchr()");
        scanf("%d",&test);
    
        switch(test){
            case 1:     /*my_strcmp test*/
            
                printf("\n***my_strcmp*** TEST");
                
                printf("\nEnter first string: ");
                scanf("%s",str1);
                
                printf("Enter second string: ");
                scanf("%s",str2);
                
                printf("\nThe result is: %d\n",my_strcmp(str1, str2));
                break;  
                
                    
            case 2:         /*my_strncmp test*/
            
                printf("\n***my_strncmp*** TEST");
                
                printf("\nEnter first string: ");
                scanf("%s",str1);
                
                printf("Enter second string: ");
                scanf("%s",str2);
                
                printf("Enter maximal number of bytes to compare: ");
                scanf("%d",&count);
                
                printf("\nThe result is: %d\n",my_strncmp(str1, str2, count));
                break;
                
            case 3: /*my_strchr test*/
            
                printf("\n***my_strchr*** TEST");
                
                printf("\nEnter string to search into: ");
                scanf("%s",str1);
                
                printf("Enter character to find: ");
                scanf(" %c", &c);
                
                printf("\nThe result is: %d\n",my_strchr(str1, c));
                break;
                
                
            default:    /*bad test flag*/
                printf("\nERROR: Entered number is not one of those: 1,2,3 while test is running\n");
                break;
        }
        
        printf("Should we continue? 0 to exit, 1 to continue");
        scanf("%d", &running);
    }
    return 0;
}

`

我试图让它在 Ubuntu 20.04 上使用重定向，这是我得到的，我做错了什么？