#include <stdio.h>
#include <stdlib.h>
double d[10] = {
1.2, 1.7, 1.3, 1.9, 0.7,
1.4, 7.4, 0.0, 1.1, 5.5
};
int main(void)
{
int i;
FILE *fp;
if((fp = fopen("my.txt", "wb"))==NULL) {
printf("Cannot open file.\n");
exit(1);
}
for( i = 0; i < 10; i++)
if(fwrite(&d[i], sizeof( double ), 1, fp) != 1) {
printf("Write error.\n");
exit(1);
}
fclose(fp);
if((fp = fopen("my.txt", "rb"))==NULL) {
printf("Cannot open file.\n");
exit(1);
}
/* clear the array */
for(i = 0; i < 10; i++)
d[i] = -1.0;
for(i = 0; i < 10; i++)
if(fread(&d[i], sizeof(double), 1, fp) != 1) {
printf("Read error.\n");
exit(1);
}
fclose(fp);
/* display the array */
for(i = 0; i < 10; i++)
printf("%f ", d[i]);
return 0;
}
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