出现错误，例如
stats.c:28:36: 错误:“factoryStats”没有名为“candyConsumed”的成员。factoryStatsArray[生产者编号].candyConsumed++；
我想要实现的是创建一个结构数组，然后访问它的成员。这是错误的做法吗？
尝试使用 -> 但这不应该也不起作用，因为我存储的是结构，而不是指向结构的指针。
#include "stats.h"
#include <stdio.h>
#include <stdlib.h>
typedef struct {
int factoryNumber = 0;
int candyProduced = 0;
int candyConsumed = 0;
double minDelay = 0;
double avgDelay = 0;
double maxDelay = 0;
} factoryStats;
factoryStats *factoryStatsArray;
int NUM_FACTORIES = 0;
void stats_init (int num_producers) {
factoryStatsArray = malloc(sizeof(factoryStats) * num_producers);
NUM_FACTORIES = num_producers;
}
void stats_cleanup (void) {
free(factoryStatsArray);
}
void stats_record_produced (int factory_number) {
factoryStatsArray[factory_number].candyProduced++;
}
void stats_record_consumed (int producer_number, double delay_in_ms) {
factoryStatsArray[producer_number].candyConsumed++;
if (factoryStatsArray[producer_number].minDelay == 0) {
factoryStatsArray[producer_number].minDelay = delay_in_ms;
} else {
if (factoryStatsArray[producer_number].minDelay > delay_in_ms) {
factoryStatsArray[producer_number].minDelay = delay_in_ms;
}
}
if (factoryStatsArray[producer_number].maxDelay == 0) {
factoryStatsArray[producer_number].maxDelay = delay_in_ms;
} else {
if (factoryStatsArray[producer_number].maxDelay < delay_in_ms) {
factoryStatsArray[producer_number].maxDelay = delay_in_ms;
}
}
factoryStatsArray[producer_number].avgDelay+= delay_in_ms;
}
void stats_display(void) {
printf("%8s%10s%10s10s10s10s\n", "Factory#", "#Made", "#Eaten", "Min Delay[ms]", "Avg Delay[ms]", "Max Delay[ms]");
for (int i = 0; i < NUM_FACTORIES; i++) {
printf("%8d%8d%8d%10.5f%10.5f%10.5f",
factoryStatsArray[i].factoryNumber, factoryStatsArray[i].candyProduced,
factoryStatsArray[i].candyConsumed, factoryStatsArray[i].minDelay,
factoryStatsArray[i].avgDelay/factoryStatsArray[i].candyConsumed,
factoryStatsArray[i].maxDelay);
}
}
最佳答案
结构不能以这种方式初始化。删除 typedef struct { ... }factoryStats; 中的所有 = 0。然后编译如 http://ideone.com/uMgDzE 所示.
关于C:动态分配结构体数组的使用，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/29158958/