下面是错误消息的图片的链接:调试断言错误的C程序
http://www.flickr.com/photos/[email protected]/6798897020/in/photostream
这里的实际编程问题。这是3号
和这里的源代码
#include <iostream>
#include <string>
#include<stdio.h>
using namespace std;
#define numItems 8
#define numSalesP 10
// the product prices
float prices [numItems] = {345.0, 853.0, 471.0, 933.0, 721.0, 663.0, 507.0, 259.00};
// the product numbers
int prodNum [numItems] = {7, 8, 9, 10, 11, 12, 13, 14};
// the salespersons IDs
int salesP [numSalesP] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
// the output file pointers
FILE * filePtrs[numSalesP];
// sales totals for every salespersons
float totals [numSalesP];
//get the product index from the prodNum array
int getProdIndex (int product) {
int i;
for (i=0; i< numItems; i++) {
if (prodNum[i] == product) {
return i;
}
}
return -1;
}
// get a product price from the product index
float getProdPrice (int prodIndex) {
return prices[prodIndex];
}
// open a salesperson output file
void openSalesPFiles() {
int i;
char fileName[16];;
for (i=0; i<numSalesP; i++) {
sprintf(fileName, "salespers%d.dat", i+1);
//DEBUG cout << fileName << endl;
filePtrs[i] = fopen(fileName, "r");
}
}
// close Salespersons files
void closeSalesPFiles() {
int i;
for (i=0; i<numSalesP; i++) {
fclose(filePtrs[i]);
}
}
// get sales person index from its ID
int getSalesPIndex (int salesPerson) {
int i;
for (i=0; i< numSalesP; i++) {
if (salesP[i] == salesPerson) {
return i;
}
}
return -1;
}
int main() {
int i; // generic counter
FILE * salesFile; // the input file with all sales
int salesPId; // salesperson ID
int salesPIndex; // salesperson index in array
int prodId; // product ID
int pIndex; // product index in array
int qty; // quantity
float total; // total for one sale
// open all salespersons output files
openSalesPFiles();
// open the input file
salesFile = fopen("sales.dat", "r");
// read all record in the input file
while (!feof(salesFile)) {
fscanf(salesFile, "%d %d %d", &salesPId, &prodId, &qty);
//DEBUG cout << salesPId << " --- " << prodId << " --- " << qty << endl;
// validate sales person
salesPIndex = getSalesPIndex (salesPId);
if (salesPIndex < 0) {
cout << "Invalid Sales person ID " << salesPId << endl;
continue;
}
//DEBUG cout << "Salesperson index : " << salesPIndex << endl;
// validate product id
pIndex = getProdIndex (prodId);
if (pIndex < 0) {
cout << "invalid product id : " << prodId << endl;
fprintf(filePtrs[salesPIndex], "Invalid Product ID %d\n", prodId);
continue;
}
else {
// compute the sale total
total = qty * prices[pIndex];
//DEBUG cout << "total : " << total << endl;;
// add it to the totals for this salesperson
totals[salesPIndex] += (qty * prices[pIndex]);
// write the sale to the salesperson file
fprintf(filePtrs[salesPIndex], "%d %d %2.2f\n", prodId, qty, total);
}
}
// print totals in salespersons files
for (i=0; i< numSalesP; i++) {
fprintf(filePtrs[i], "Total Sales : %8.2f\n", totals[i]);
}
// close all files
closeSalesPFiles();
fclose(salesFile);
}
什么是错的代码,会让我有这样的错误?谢谢:S
投票结束为'这个问题不适合我们的问答格式。我们期望答案通常涉及事实,参考或具体的专业知识;这个问题可能会征求意见,辩论,争论,投票或扩大讨论。请尝试使您的问题更适合该网站的未来访问者,并访问[FAQ](http://stackoverflow.com/faq) – 2012-03-02 00:19:26
我同意:但我应该补充一点,如果您正在关注的那本书鼓励您类似于你需要一本新书的代码,那就是C++中的C,你错过了C++ – 111111 2012-03-02 00:21:05
提供的抽象概念。你为什么不返回一些值或者有更多的参数而不是全局变量。 Theres没有理由filePtrs openSalesPFiles无法获取文件列表或返回它而不是将其用作全局文件。此外,如果您允许使用C++ 11,那么您可以编写'auto varname = func();' – 2012-03-02 00:26:29