C語言檔案寫入結構體的亂碼解決方法
阿新 • • 發佈：2019-02-11
int main ()
{
FILE * pFile;
FILE * temp;
double xvalue, yvalue;
struct punto{
float x;
float y;
} pto;
xvalue = 1;
temp = fopen("temp.aux", "w+");
int i;
for(i = 0; i < 10; i++){
pto.x = i;
pto.y = 0;
fwrite(&pto, sizeof(pto), 1, temp);
}
pFile = fopen ("myfile.txt", "w+");
rewind(temp);
fread(&pto, sizeof(pto), 1, temp);
while(!feof(temp)){
//pto.x = xvalue;
pto.y = rand()%100;
fprintf(stdout, "%f %f\n", pto.x, pto.y);
fprintf(pFile, "%f %f\n", pto.x, pto.y);
fseek(temp, -sizeof(pto), SEEK_CUR);
fwrite(&pto, sizeof(pto), 1, temp);
fread(&pto, sizeof(pto), 1, temp);
sleep(1);
}
fclose(temp);
remove("temp.dat");
fclose(pFile);
return 0;
}