Question

我编写的以下程序在用户输入“ 1”后立即停止，并且未完成功能km.miles。我做错了什么？

#include <stdio.h>

void kilometer_mile() {
    char inputChar;
    double kilometers = 0.0;
    double miles = 0.0;
    printf("To convert from Kilometers to Miles enter 'K'\n"
        "To convert from Miles to Kilometers enter 'M'\n");
    scanf("%c", &inputChar);
    if(inputChar == 'K') {
        printf("Enter kilometers: ");
        scanf("%c", &inputChar);
        miles = kilometers/1.609;
        printf("%lf kilometers is equal to %lf miles", kilometers, miles);
    } else if(inputChar == 'M') {
        printf("Enter miles: ");
        scanf("%c", &inputChar);
        kilometers = miles/1.609;
        printf("%lf miles is equal to %lf kilometers", miles, kilometers);
    }
}
int main() {
    int inputValue = 0;
    printf("Type 1 to convert from Kilometers to Miles\n"
        "Type 2 to convert from Meters to Feet\n"
        "Type 3 to convert from Centimetre to Inch\n"
        "Type 4 to convert from Celsius to Fahrenheit\n"
        "Type 5 to quit the program\n");
    scanf("%d", &inputValue);

    if(inputValue == 1) {
        kilometer_mile();
    }
    return 0;
}

Answer 1

问题是您没有读取用户在第一个scanf功能上按Enter键时也会发出的“ \ n”；因此，在您的kmometer_mile函数中，您实际上是在char上读取“ \ n”，而在给定的两个if中都不显示

C程序提前结束

1 个答案: