Discussion
What will be the output of the program ?
#include <stdio.h>
#include <string.h>
int main()
{
char str1[20] = "Hello", str2[20] = " World";
printf("%s\n", strcpy(str2, strcat(str1, str2)));
return 0;
}
Answer: C
Correct answer: Hello World
Work outwards. strcat(str1, str2) appends " World" to "Hello", making str1 hold "Hello World" and returning a pointer to it. strcpy(str2, ...) then copies that into str2 and returns str2. Both arrays are 20 bytes, so there is room, and the printed string is Hello World.
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