Mega Code Archive
Save and read string into a file
<![CDATA[
#include <stdio.h>
#include <stdlib.h>
double d[10] = {
1.3, 2.7, 1.4, 1.9, 0.7,
1.4, 4.4, 2.0, 1.1, 3.5
};
int main(void)
{
int j;
FILE *filep;
if((filep = fopen("myfile.txt", "wb"))==NULL) {
printf("Cannot open file.\n");
exit(1);
}
for( j = 0; j < 10; j++)
if(fwrite(&d[j], sizeof( double ), 1, filep) != 1) {
printf("Write error.\n");
exit(1);
}
fclose(filep);
if((filep = fopen("myfile.txt", "rb"))==NULL) {
printf("Cannot open file.\n");
exit(1);
}
/* clear the array */
for(j = 0; j < 10; j++)
d[j] = -1.0;
for(j = 0; j < 10; j++)
if(fread(&d[j], sizeof(double), 1, filep) != 1) {
printf("Read error.\n");
exit(1);
}
fclose(filep);
/* display the array */
for(j = 0; j < 10; j++)
printf("%f ", d[j]);
return 0;
}
]]>