strcat() in C
C strcat() function appends the string pointed to by src to the end of the string pointed to by dest. It will append a copy of the source string in the destination string. plus a terminating Null character. The initial character of the string(src) overwrites the Null-character present at the end of the string(dest).
It is a predefined string handling function under string library <string.h> in c and <cstring> in C++.
char *strcat(char *dest, const char *src);
Parameters: The method accepts the following parameters:
- dest: This is a pointer to the destination array, which should contain a C string, and should be large enough to contain the concatenated resulting string.
- src: This is the string to be appended. This should not overlap the destination.
- The strcat() function returns dest, the pointer to the destination string.
Input: src = "ForGeeks" dest = "Geeks" Output: "GeeksForGeeks" Input: src = "World" dest = "Hello " Output: "Hello World"
Below is the C/C++ program to implement the above approach:
The behavior of strcat() is undefined if:
- the destination array is not large enough for the contents of both src and dest and the terminating null character
- if the string overlaps.
- if either dest or src is not a pointer to a null-terminated byte string.
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