I am creating a function for reading numbers from file into an array. But it seems like after returning from the function, the last value is lost. Here is my code:

void loadDataset(int* dataSet, int DataSetSize, char *filename) { FILE *fp; fp = fopen( filename , "r" ); for(int i=0; i< DataSetSize; i++){ fscanf(fp, "%d", &dataSet[sizeof(int) * i]); } for (int i = 0; i < DataSetSize; i++) { printf("%d\n", dataSet[sizeof(int) * i]); } fclose(fp); } int main(int argc, char *argv[]) { ... int* ds = malloc(sizeof(int) * DataSetSize); loadDataset(ds, DataSetSize, DatasetFilename); for (int i = 0; i < DataSetSize; i++) { printf("%d\n", ds[sizeof(int) * i]); } ... } 

The file I am testing with contains numbers from 1 to 6. While in function loadDataset, the printed result is

1 2 3 4 5 6 

But when back in main function, the printed result is

1 2 3 4 5 0 

What could be the problem?
I am sorry if it is something trivial I am missing, but I am not very familiar with programming in C.