Question

#include <stdio.h>

int main() {
    //US CONVERSION RATES
    float const usToGBP = .78;
    float const usToAUD = 1.40;
    float const usToBit = .00027;
    float const usToEur = .88;
    float const usToCAD = 1.33;
    //GBP CONVERSION RATES
    float const gbpToUS = 1.29;
    float const audToUS = .72;
    float const bitToUS = 3696.11;
    float const euroToUS = 1.14;
    float const cadToUS = .75;
//////////////////////////

    float amount;
    printf("How much currency do you have? ");
    scanf("%f", amount);

    //NOTHING BELOW PRINTS
    printf("%f", amount);
    printf("HEYYY");
    printf("||   US   ||   GBP   ||   AUD   ||   BIT   ||   EUR   ||   CAD 
    ||");

我是C语言的新手，所以我仍在学习基本输入和输出的语法。目前，我正在尝试编写一个简单的程序来转换货币。我使用scanf来收取一定金额，但是，当我尝试在此之后打印任何东西（例如表格或金额）时，则什么都没显示？有人可以解释为什么会这样吗？

Answer 1

应该是

scanf("%f", &amount);

Answer 2

输入时您未使用＆符号

#include <stdio.h>

int main() {
    //US CONVERSION RATES
    float const usToGBP = .78;
    float const usToAUD = 1.40;
    float const usToBit = .00027;
    float const usToEur = .88;
    float const usToCAD = 1.33;
    //GBP CONVERSION RATES
    float const gbpToUS = 1.29;
    float const audToUS = .72;
    float const bitToUS = 3696.11;
    float const euroToUS = 1.14;
    float const cadToUS = .75;
//////////////////////////

    float amount;
    printf("How much currency do you have? ");
    scanf("%f", &amount); //use ampersand

    //NOTHING BELOW PRINTS
    printf("%f", amount);
    printf("HEYYY");
    printf("||   US   ||   GBP   ||   AUD   ||   BIT   ||   EUR   ||   CAD ||");
}

printf scanf之后不打印吗？

2 个答案: