问题表明我需要两个结构,STRUCTURE1 和 STRUCTURE2(我知道的原始结构)。STRUCTURE1 包含 5 个浮点值(不是数组)和一个指针。STRUCTURE2 保存 1 个浮点值和一个指向另一种 STRUCTURE2 类型的指针。我还需要一个指针数组,其中每个元素都指向一个 STRUCTURE1。然后每个第一个 STRUCTURE1 都指向另一个 STRUCTURE1,然后 THAT STRUCTURE1 需要指向一个 STRUCTURE2(这是类型转换的来源)。
下面是我的代码的重要部分,问题(至少我遇到错误的地方)在 printToFile()trav2 = (STRUCT2*)trav1->next;
中我遇到分段错误的部分。
void main(){
STRUCT1 *ptr[20] = {NULL}; //Array of pointers that point to type STRUCT1
float min, max;
int i, j, answer;
for(i = 0; i < 19; i++){ //19 to leave the 20th array spot for NULL
printf("\nWould you like to add 2 more sets of numbers?\n");
printf("1: Yes\n");
printf("2: No\n");
scanf("%d", &answer);
if(answer == 1){
printf("\nFirst set of numbers:\n");
ptr[i] = getData();
printf("\nSecond set of numbers:\n");
ptr[i]->next = getData();
min = getMin(ptr[i]);
max = getMin(ptr[i]->next);
STRUCT2 *trav;
trav = (STRUCT2*)malloc(sizeof(STRUCT1));
trav = (STRUCT2*)ptr[i]->next;
trav->next = assignMin(min);
trav = trav->next;
trav->next = assignMax(max);
}else{
break;
}
}
printToFile(ptr);
printf("\nProgram Done\n");
}
STRUCT1* getData(){
STRUCT1 *newStruct;
newStruct = (STRUCT1*)malloc(sizeof(STRUCT1));
float num;
printf("Enter number 1: ");
scanf("%f", &num);
newStruct->f1 = num;
printf("Enter number 2: ");
scanf("%f", &num);
newStruct->f2 = num;
printf("Enter number 3: ");
scanf("%f", &num);
newStruct->f3 = num;
printf("Enter number 4: ");
scanf("%f", &num);
newStruct->f4 = num;
printf("Enter number 5: ");
scanf("%f", &num);
newStruct->f5 = num;
return newStruct;
}
void printToFile(STRUCT1 *ptr[]){
FILE *f;
f = fopen("structure.txt", "w");
int i, j;
STRUCT1 *trav1;
STRUCT2 *trav2;
trav1 = (STRUCT1*)malloc(sizeof(STRUCT1));
trav2 = (STRUCT2*)malloc(sizeof(STRUCT2));
for(i = 0; i < 20; i++){
fprintf(f, "%.3f,%.3f,%.3f,%.3f,%.3f\n", ptr[i]->f1, ptr[i]->f2, ptr[i]->f3, ptr[i]->f4, ptr[i]->f5);
trav1 = ptr[i]->next;
fprintf(f, "%.3f,%.3f,%.3f,%.3f,%.3f\n", trav1->f1, trav1->f2, trav1->f3, trav1->f4, trav1->f5);
trav2 = (STRUCT2*)trav1->next;
fprintf(f, "Minimum of first number set: %.3f\n", trav2->f1);
trav2 = trav2->next;
fprintf(f, "Maximum of second number set: %.3f\n", trav2->f1);
fprintf(f, "\n");
}
}
这可能都是非常非常错误的,但我的教授从未谈论过指向不同类型的指针,而且关于结构的部分也很短。希望它没有完全拙劣,只需要在这里和那里做一些事情。
有人认为他们看到哪里出了问题吗?