C基本数据字符串返回功能 [英] C Basic String Return Function

问题描述

我还是pretty新C.我还是不明白指针一切都没有。
我试图使该返回一个字符串的方法。
这里的功能，它仍然是不完整的。

I'm still pretty new to C. I still don't understand everything with pointers at all. I'm trying to make a method that returns a String. Here's the function, it's still incomplete.

char getS(char *fileName){
    FILE *src;
    if((src = fopen(fileName, "r")) == NULL){
        printf("%s %s %s", "Cannot open file ", fileName, ". The program is now ending.");
        exit(-1);
    }
    char *get = " ";        
    //insert getting a random word here
    return(*get);
}

和我想这样调用方法

char *article = getS("articles.txt");
char *noun = getS("nouns.txt");
char *verb = getS("verbs.txt");

编译器是给我这样的：

The compiler is giving me this:

error: invalid type argument of unary ‘*’ (have ‘int’)

我应该怎么办？

推荐答案

您函数返回一个char *（字符串），而不是一个char，它应该返回相同。所以函数变为：

Your function should return a char * (a string), instead of a char, and it should return the same. So the function becomes:

char * getS(char *fileName) {
    FILE *src;
    if((src = fopen(fileName, "r")) == NULL) {
        printf("%s %s %s", "Cannot open file ", fileName, ". The program is now ending.");
        exit(-1);
    }

    char *get = " ";        
    //insert getting a random word here

    return get;
}

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