C功能不起作用

Question

我正在编写一个函数Calculate_age_when_Trump_elected(int year_born)来返回结果，并为age_when_Trump_elected分配一个值。

结果应该是YEAR_TRUMP_ELECTED减去特朗普诞生的年份，但目前只显示用户输入的输入。

“terminal_user_input.c”只是函数read_string和read_integer的文件。

#include <stdio.h>
#include <ctype.h>
#include <stdbool.h>
#include "terminal_user_input.c"

#define YEAR_TRUMP_ELECTED 2016


// A very basic  read boolean function

bool read_boolean(const char* prompt)
{
    my_string answer;
    bool result;

    answer = read_string(prompt);
    answer.str[0] = (char) tolower(answer.str[0]);

    switch (answer.str[0]) {
        case 'n':
            result = false;
            break;
        case 'x':
            result = false;
            break;
        default:
            result = true;
    }

    return result;
}

int Calculate_age_when_Trump_elected(int year_born)
{
    int result;
    result = YEAR_TRUMP_ELECTED - year_born;

    return 0;
}

int main()
{
    my_string name;
    int age_when_Trump_elected;
    int year_born;
    bool brexiter;

    name = read_string("What is your name? ");

    year_born = read_integer("When you were born? ");
    age_when_Trump_elected = Calculate_age_when_Trump_elected(year_born);
    printf("You were %d years old when Trump was elected\n",year_born);

    brexiter = read_boolean("Are u a Brexit support? ");

    if (brexiter == true)
    {
       printf("%s is a Brexit supporter\n",name.str);
    }
    else
    {
       printf("%s isn't a Brexit supporter\n",name.str);
    }

    read_string("Type 'exit' to continue ");

    return 0;
}

Answer 1

看看0。它将始终返回result。您应该返回<?xml version="1.0" encoding="utf-8"?> <android.support.v4.widget.DrawerLayout> <android.support.design.widget.AppBarLayout> <android.support.v7.widget.Toolbar/> </android.support.design.widget.AppBarLayout> <LinearLayout> <include layout="@layout/drawer_header"/> <android.support.design.widget.NavigationView/> <include layout="@layout/drawer_footer"/> </LinearLayout> </android.support.v4.widget.DrawerLayout> 变量。