C File Input/output - Example

Example

The following C program opens a binary file called myfile, reads five bytes from it, and then closes the file.

#include #include int main(void) { char buffer = {0}; /* initialized to zeroes */ int i, rc; FILE *fp = fopen("myfile", "rb"); if (fp == NULL) { perror("Failed to open file \"myfile\""); return EXIT_FAILURE; } for (i = 0; (rc = getc(fp)) != EOF && i < 5; buffer = rc) { } fclose(fp); if (i == 5) { puts("The bytes read were..."); printf("%x %x %x %x %x\n", buffer, buffer, buffer, buffer, buffer); } else fputs("An error occurred while reading the file.\n", stderr); return EXIT_SUCCESS; }

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