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hes end of non-void function =====
You must add a return value at the end of your sourcecode:
<code c>
#i... ,i);
/* to fix the warning add for this example "return 0;"
* warning: control reaches end of non-void function
*/
//<- here
}
</code>
===== warning: return type defaults to ‘int’ =====
Add a return type to... ent this for Windows */
/* code example warnings return type defaults to ‘int’
* http://code-reference.c
====== return ======
Terminate a function and return a value from a function to the calling function, if desired.
==== Syntax: ====
return;
return value; // both forms are valid
==== Parameters ... (){
if (analogRead(0) > 400) {
return 1;
else{
return 0;
}
}</code>
The return keyword is handy to test a section of code without having to "comment out" large sections o
ither a null pointer or a unique pointer.\\
=== return value ===
RETURN VALUE
Upon successful completion with size not equal to 0, malloc() shall return a pointer to the allocated space.\\
If size is 0, ... o free() shall be returned.\\
Otherwise, it shall return a null pointer and set errno to indicate the erro... printf("allocation of memory failed.\n");
}
return 0;
}
int main ( void )
{
int *buffer, i;
pr
function to compare two elements together.\\
== return values: ==
pointer to an entry in the array that ... the compare function for this bsearch */
char *return_value = (char*) bsearch(my_key, my_strings, my_el... (int(*)(const void*, const void*))strcmp);
if (return_value) {
printf("Found \"%s\" in the my_strings array.\n", return_value);
}
else {
printf("Did not found \"%s\" in the my_strings array.\
located, a null pointer shall be returned.\\
=== return value ===
Upon successful completion with a size not equal to 0, realloc() shall return a pointer to the (possibly moved) allocated space.\\
If size ... e is not enough available memory, realloc() shall return a null pointer and set errno to [ENOMEM].\\
==... printf("allocation of memory failed.\n");
}
return 0;
}
int main ( void )
{
int *buffer;
printf
either a null pointer or a unique pointer.\\
=== return value ===
Upon successful completion with both nelem and elsize non-zero, calloc() shall return a pointer to the allocated space. \\
If either nelem ... o free() shall be returned.\\
Otherwise, it shall return a null pointer and set errno to indicate the erro... printf("allocation of memory failed.\n");
}
return 0;
}
</code>
==== Output ====
Output alloca
0 then
self:init(true)
return
else
if self.y >= 1000 or se... self:init(true)
return
end
end
if math.rand... self.size = self.size + 1
return
end
end
if s... self.size = self.size + 1
return
end
end
freed space results in undefined behavior.\\
=== return value ===
The free() function shall not return a ... printf("allocation of memory failed.\n");
}
return 0;
}
int main ( void )
{
int *buffer;
printf(... f("try to free the buffer\n");
free (buffer);
return 0;
}
</code>
==== Output ====
user@host:~$
2 C strings.
If both strings are identical, the return value of strcmp is 0. \\
If the string s1 less than s2, the return value is less than 0, \\
and s1 is greater than s2, then the return value greater ... else {
printf("different\n");
}
return 0;
}
</code>
=== Output of strcmp example ===
de>
1970-01-01 00:00:00 +0000 (UTC).
=== return value ===
The ctime() function shall return ... nt.\\
Upon successful completion, ctime_r() shall return a pointer to the string pointed to by buf. When a... t);
printf("%s\n", ctime(&time_format));
return 0;
}
</code>
=== output for this example ===