Concenate integer values has string

Projects Programming
1

Dear all.
i would like to know is it possible to concanate the integer value as complete string
i have 4 parameter
a=1;
b=2;
c=3;
d=4;
String s1=(char*)(a+b+c+d);
if yes how can we do it

expected output: "1234"

2

sir,
i had done like below,

int a = 1;
int b = 2;
char str1[5];
char str2[5];
void setup()
{
  Serial.begin(9600);
  sprintf(str1, "%d", a);
  sprintf(str2, "%d", b);
  strcat(str1, str2);
  Serial.println(str1);
}
void loop()
{
   //
}
3 
char str[5]; // make it big enough for your longest string, including the null terminator
int a=1;
int b=2;
int c=3;
int d=4;

snprintf(str, sizeof(str), "%d%d%d%d", a, b, c, d);

// str now contains "1234"