C言語:printfデバッグチートシート

printf では見えないケースが多いのでファイルに残す

code:print_to_file.c

FILE *pFile = NULL;

pFile = fopen("/tmp/mytest.log", "at");

fprintf(pFile, "%s\n", "Hello, world!");

fprintf(pFile, "%02hhx\n", char_value);

fprintf(pFile, "%hd\n", short_value);

fprintf(pFile, "%d\n", int_value);

fprintf(pFile, "%ld\n", long_value);

fprintf(pFile, "%lld\n", longlong_value);

fprintf(pFile, "%hf\n", float_value);

fprintf(pFile, "%f\n", double_value);

fprintf(pFile, "%lf\n", long_double_value);

fprintf(pFile, "%p\n", pointer);

fprintf(pFile, "%zu\n", size_t_value);

fprintf(pFile, "%zu\n", size_t_value);

fprintf(pFile, "%" PRIdMAX "\n", (intmax_t)value);

fclose(pFile);