Hi I wrote this sorting algorithm and I'm not sure why I'm getting the following error: "member reference base type 'int' is not a structure or union"
void sort(float avg_dist, cg[]){
int i,j,t;
for(i=1; i<=cg[i]-1; i++)
for(j=1; j<=cg[i]-i; j++)
if(cg[j-1].avg_dist >= cg[j].avg_dist){
t = cg[j-1];
cg[j-1] = cg[j];
cg[j] = t;
}
}
cg is an int array.
You can't access a "member" of an int, as in
cg[j-1].avg_dist
I'm not sure what you're trying to do. Maybe multiply ?
cg[j-1] * avg_dist
It's not the problem, but you're (perhaps intentionally) omitting the type specifier in your function
void sort(float avg_dist, cg[]){
C is defaulting to an int array type, which of course, renders cg[j].avg_dist syntactically invalid. (In reality you probably want to multiply by avg_dist, use * rather than the member selection operator .).
This should give you a clear Idea:
#include <stdio.h>
void sortArray(int *array, int length){
int i,j, k, temp;
for (i = 0 ; i < length-1; i++){
for (k = 0 ; k < length-i-1; k++){
if (array[k] > array[k+1]){
temp = array[k];
array[k] = array[k+1];
array[k+1] = temp;
}
}
}
printf("The result:\n");
for ( j = 0 ; j < length ; j++ ){
printf("%d ", array[j]);
}
}
int main(void){
int array[] = {1,4,2,-1,2,3,4,1,3,-1};
int length = sizeof array / sizeof array[0];
sortArray(array, length);
printf("\n");
return 0;
}
Output:
The result: -1 -1 1 1 2 2 3 3 4 4
cgis? It's an invalid function declaration (well, valid for the compiler, but you don't mean it).