C 简单的分段错误，我可以'；我似乎找不到问题所在

也许有一个简单的解决办法，但作为一个noob，我似乎找不到问题所在。当我第一次运行程序时，一切正常，但在

扫描（“%f”，hrs）

之后，我得到了“分段错误（内核转储）”。任何帮助都将不胜感激，谢谢。如果你想看完整的代码

我得到的警告是：格式“%f”要求参数类型为“float*”，但参数2的类型为“double”

float grossModule(float *hours, float payrate, float *overtimeHours);
void CalculateTaxes(float *gross, float *defr, float *fedtax, float *statetax, float *ssitax);
float calcFedtax(float gross, float defr);
float calcStatetax(float fedtax);
float calcSSItax(float gross, float defr);
float netModule(float *gross, float *ft, float *st, float *ssit);

int main(void)
{
    float dfr,ft,st,ssit,gross,hrs,pay,net,ovrtHrs;
    int counter = 0;
    float netTotal, payTotal, hoursTotal, overtimeTotal, grossTotal, fedTotal, stateTotal, ssiTotal, dfrTotal;
    float grossAvg, netAvg, payAvg, hoursAvg, overtimeAvg, fedAvg, stateAvg, ssiAvg, dfrAvg;
    char fName[11], lName[21], ask[4];
    FILE * myreport;
    myreport = fopen("reports.txt","wt");

fprintf(myreport, header1);
fprintf(myreport, header2);
fprintf(myreport, header3);

netTotal = payTotal = hoursTotal = overtimeTotal = grossTotal = fedTotal = stateTotal = ssiTotal = dfrTotal = 0;
dfr = ft = st = ssit = gross = hrs = pay = net = ovrtHrs = 0;

do
{
    counter++;
    printf("Please enter your FIRST name: ");
    scanf("%s",fName);
    printf("Please enter your LAST name: ");
    scanf("%s",lName);
    printf("Enter your payrate: \n");
    scanf("%f",pay);
    printf("Please enter your total hours: ");
    scanf("%f",hrs);
    printf("Please enter the amount of deferred earnings: ");
    scanf("%f",dfr);

改变

到

scanf

需要变量的地址，而不是它的内容

---

顺便说一句，编译器应该对此发出警告。

我想是这样的，但我不太明白这个警告。谢谢@丹：你为什么不在代码中贴任何警告？@MartinJames抱歉，下次会的。我还在习惯这里的一切。我将编辑我的帖子并添加警告。

 scanf("%f",pay);
 printf("Please enter your total hours: ");
 scanf("%f",hrs);
 printf("Please enter the amount of deferred earnings: ");
 scanf("%f",dfr);Change 

 scanf("%f", &pay);
 printf("Please enter your total hours: ");
 scanf("%f", &hrs);
 printf("Please enter the amount of deferred earnings: ");
 scanf("%f", &dfr);