Here another simple example:
Code:
#include <stdio.h>
int main(void)
{
char buffer[BUFSIZ];
char filename[] = "c:\\temp\\test.txt";
FILE *fp = NULL;
fp = fopen(filename, "w"); /* open file for reading */
if(fp == NULL) /* ALWAYS CHECK RETURN VALUE !!! */
{
printf("Failed to open file for writing\n");
return -1;
}
fputs("Hello world\n", fp); /* write a string to file */
fputc('A', fp); /* write a character to file */
fclose(fp); /* close file */
fp = fopen(filename, "a"); /* open file for appending !!! */
if(fp == NULL)
{
printf("Failed to open file for appending\n");
return -2;
}
fprintf(fp, "\nMy age is %d\n", 99); /* write a formatted string to file */
fclose(fp);
fp = fopen(filename, "r"); /* open file for reading */
if(fp == NULL)
{
printf("Failed to open file for reading\n");
return -3;
}
while(fgets(buffer, BUFSIZ, fp) != NULL)
printf(buffer);
fclose(fp);
return 0;
}
Check the Manual Pages for the following funcitons:
- fopen - fclose - fprintf - fputs - fputc - fwrite - fread - fgets - etc
output to a file in C
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