
| Función | Librería | Fichero de cabecera C | Fichero de cabecera C++ |
| abort | stdlib | stdlib.h | cstdlib |
| abs | stdlib | stdlib.h | cstdlib |
| acos | math | math.h | cmath |
| asctime | time | time.h | ctime |
| asin | math | math.h | cmath |
| atan | math | math.h | cmath |
| atan2 | math | math.h | cmath |
| atexit | stdlib | stdlib.h | cstdlib |
| atof | stdlib | stdlib.h | cstdlib |
| atoi | stdlib | stdlib.h | cstdlib |
| atol | stdlib | stdlib.h | cstdlib |

| Función | Librería | Fichero de cabecera C | Fichero de cabecera C++ |
| bsearch | stdlib | stdlib.h | cstdlib |

| Función | Librería | Fichero de cabecera C | Fichero de cabecera C++ |
| calloc | stdlib | stdlib.h | cstdlib |
| ceil | math | math.h | cmath |
| clearerr | stdio | stdio.h | cstdio |
| clock | time | time.h | ctime |
| cos | math | math.h | cmath |
| cosh | math | math.h | cmath |
| ctime | time | time.h | ctime |

| Función | Librería | Fichero de cabecera C | Fichero de cabecera C++ |
| difftime | time | time.h | ctime |
| div | stdlib | stdlib.h | cstdlib |

| Función | Librería | Fichero de cabecera C | Fichero de cabecera C++ |
| exit | stdlib | stdlib.h | cstdlib |
| exp | math | math.h | cmath |

| Función | Librería | Fichero de cabecera C | Fichero de cabecera C++ |
| fabs | math | math.h | cmath |
| fclose | stdio | stdio.h | cstdio |
| feof | stdio | stdio.h | cstdio |
| ferror | stdio | stdio.h | cstdio |
| fflush | stdio | stdio.h | cstdio |
| fgetc | stdio | stdio.h | cstdio |
| fgetpos | stdio | stdio.h | cstdio |
| fgets | stdio | stdio.h | cstdio |
| floor | math | math.h | cmath |
| fmod | math | math.h | cmath |
| fopen | stdio | stdio.h | cstdio |
| formato | stdio | stdio.h | cstdio |
| fprintf | stdio | stdio.h | cstdio |
| fputc | stdio | stdio.h | cstdio |
| fputs | stdio | stdio.h | cstdio |
| fread | stdio | stdio.h | cstdio |
| free | stdlib | stdlib.h | cstdlib |
| freopen | stdio | stdio.h | cstdio |
| frexp | math | math.h | cmath |
| fscanf | stdio | stdio.h | cstdio |
| fseek | stdio | stdio.h | cstdio |
| fsetpos | stdio | stdio.h | cstdio |
| ftell | stdio | stdio.h | cstdio |
| fwrite | stdio | stdio.h | cstdio |

| Función | Librería | Fichero de cabecera C | Fichero de cabecera C++ |
| getc | stdio | stdio.h | cstdio |
| getchar | stdio | stdio.h | cstdio |
| getenv | stdlib | stdlib.h | cstdlib |
| gets | stdio | stdio.h | cstdio |
| gmtime | time | time.h | ctime |

| Función | Librería | Fichero de cabecera C | Fichero de cabecera C++ |
| labs | stdlib | stdlib.h | cstdlib |
| ldexp | math | math.h | cmath |
| ldiv | stdlib | stdlib.h | cstdlib |
| localeconv | locale | locale.h | clocale |
| localtime | time | time.h | ctime |
| log | math | math.h | cmath |
| log10 | math | math.h | cmath |
| longjmp | setjmp | setjmp.h | csetjmp |

| Función | Librería | Fichero de cabecera C | Fichero de cabecera C++ |
| malloc | stdlib | stdlib.h | cstdlib |
| mblen | stdlib | stdlib.h | cstdlib |
| mbstowcs | stdlib | stdlib.h | cstdlib |
| mbtowc | stdlib | stdlib.h | cstdlib |
| memchr | string | string.h | cstring |
| memcmp | string | string.h | cstring |
| memcpy | string | string.h | cstring |
| memmove | string | string.h | cstring |
| memset | string | string.h | cstring |
| mktime | time | time.h | ctime |
| modf | math | math.h | cmath |

| Función | Librería | Fichero de cabecera C | Fichero de cabecera C++ |
| perror | stdio | stdio.h | cstdio |
| pow | math | math.h | cmath |
| printf | stdio | stdio.h | cstdio |
| putc | stdio | stdio.h | cstdio |
| putchar | stdio | stdio.h | cstdio |
| puts | stdio | stdio.h | cstdio |

| Función | Librería | Fichero de cabecera C | Fichero de cabecera C++ |
| qsort | stdlib | stdlib.h | cstdlib |

| Función | Librería | Fichero de cabecera C | Fichero de cabecera C++ |
| raise | signal | signal.h | csignal |
| rand | stdlib | stdlib.h | cstdlib |
| realloc | stdlib | stdlib.h | cstdlib |
| remove | stdio | stdio.h | cstdio |
| rename | stdio | stdio.h | cstdio |
| rewind | stdio | stdio.h | cstdio |

| Función | Librería | Fichero de cabecera C | Fichero de cabecera C++ |
| scanf | stdio | stdio.h | cstdio |
| setbuf | stdio | stdio.h | cstdio |
| setjmp | setjmp | setjmp.h | csetjmp |
| setlocale | locale | locale.h | clocale |
| setvbuf | stdio | stdio.h | cstdio |
| signal | signal | signal.h | csignal |
| sin | math | math.h | cmath |
| sinh | math | math.h | cmath |
| sprintf | stdio | stdio.h | cstdio |
| sqrt | math | math.h | cmath |
| srand | stdlib | stdlib.h | cstdlib |
| sscanf | stdio | stdio.h | cstdio |
| strcat | string | string.h | cstring |
| strchr | string | string.h | cstring |
| strcmp | string | string.h | cstring |
| strcoll | string | string.h | cstring |
| strcpy | string | string.h | cstring |
| strcspn | string | string.h | cstring |
| strerror | string | string.h | cstring |
| strftime | time | time.h | ctime |
| strlen | string | string.h | cstring |
| strncat | string | string.h | cstring |
| strncmp | string | string.h | cstring |
| strncpy | string | string.h | cstring |
| strpbrk | string | string.h | cstring |
| strrchr | string | string.h | cstring |
| strspn | string | string.h | cstring |
| strstr | string | string.h | cstring |
| strtod | stdlib | stdlib.h | cstdlib |
| strtok | string | string.h | cstring |
| strtol | stdlib | stdlib.h | cstdlib |
| strtoul | stdlib | stdlib.h | cstdlib |
| strxfrm | string | string.h | cstring |
| system | stdlib | stdlib.h | cstdlib |

| Función | Librería | Fichero de cabecera C | Fichero de cabecera C++ |
| tan | math | math.h | cmath |
| tanh | math | math.h | cmath |
| time | time | time.h | ctime |
| tmpfile | stdio | stdio.h | cstdio |
| tmpnam | stdio | stdio.h | cstdio |
| tolower | ctype | ctype.h | cctype |
| toupper | ctype | ctype.h | cctype |

| Función | Librería | Fichero de cabecera C | Fichero de cabecera C++ |
| ungetc | stdio | stdio.h | cstdio |

| Función | Librería | Fichero de cabecera C | Fichero de cabecera C++ |
| vfprintf | stdio | stdio.h | cstdio |
| vprintf | stdio | stdio.h | cstdio |
| vsprintf | stdio | stdio.h | cstdio |

| Función | Librería | Fichero de cabecera C | Fichero de cabecera C++ |
| wctomb | stdlib | stdlib.h | cstdlib |