Question

输出完全错误，我预计它会打印一行，然后将我的输入扫描到变量中，然后打印下一行，扫描我的输入等等。但它打印第一行，然后我必须放我的号码两次，它可以做任何事情，而且距离那里只是下坡路。有什么帮助吗？

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

int main(void)
{
    float balance;
    int years;
    float interestRateAnual;
    int frequencyOfInterest;
    double totalCost;

    printf( "Insert amount of money to be deposited.\n" );
    scanf( "%f\n", &balance );

    printf( "How many years for the interest?\n" );
    scanf( "%d\n", &years );

    printf( "What is the anual interest rate?\n" );
    scanf( "%f\n", &interestRateAnual );

    printf( "How many times per year is the interest compounded?\n" );
    scanf( "%d\n", &frequencyOfInterest );

    totalCost = pow(balance*(1 + interestRateAnual/frequencyOfInterest), years);

    printf( "After %d years, with an interest rate of %f% per year, ", years, interestRateAnual );
    printf( "the total you will have to pay is %e.\n", totalCost );


    return 0;
}

Answer 1

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

int main(void)  
{   
float balance;   
int years;  
float interestRateAnual;  
int frequencyOfInterest;  
double totalCost; 

printf( "Insert amount of money to be deposited.\n" );
scanf( "%f\n", &balance );

printf( "How many years for the interest?\n" );
scanf( "%d\n", &years );

printf( "What is the anual interest rate?\n" );
scanf( "%f\n", &interestRateAnual );

printf( "How many times per year is the interest compounded?\n" );
scanf( "%d\n", &frequencyOfInterest );

totalCost = balance*pow((1 + interestRateAnual/frequencyOfInterest), (years*frequencyOfInterest));

printf( "After %d years, with an interest rate of %f% per year, ", years, interestRateAnual );
printf( "the total you will have to pay is %e.\n", totalCost );


return 0;
}

Answer 2

请从所有 \n删除scanf()：

将scanf( "%d\n", &years );替换为scanf( "%d", &years );
将scanf( "%f\n", &balance );替换为scanf( "%f\n", &balance );

依旧......

＆＃39; \ n＆＃39;第一次调用scanf后，字符仍然留在输入流上，因此第二次调用scanf（）会将其读入。

如果查看scanf的参考文献，您会看到：

格式字符串由空格字符组成（任何单个字符）格式字符串中的空格字符占用所有可用字符来自输入的连续空格字符

所以\ n会触发这种效果，如果你不想要这种行为，就不要理会\ n：

scanf（＆＃34;％d＆＃34;，＆amp; years）;

或者，您可以使用以下功能：

void fflushstdin( void )
{
    int c;
    while( (c = fgetc( stdin )) != EOF && c != '\n' );
}

清除输入缓冲区。

复利计算器 - C.

2 个答案: