how to make an integer variable by extracting first few array locations

I want to ask that is there a way through which I can convert some part of int array to int variable

for example

   // my integer array contain 3,4,5,2,7 
    int array[] = {3,4,5 ,7,1,5,5,} ;

and i want a variable int to contain only first 3 member of array that is my variable should be like this

`

int var = 345 ; // first three array members

i am using c programming thank开发者_JAVA技巧s

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Something like this maybe ?

int var = 0;

for (i = 0; i < 3; i++) {
    var *= 10;
    var += array[i];
}

---

You mean string connect?

char tmp[64];
sprintf(tmp, "%d%d%d", array[0], array[1], array[2]);
var = atoi(tmp);

Note the code above didn't check for int or buffer overflow.

---

char *s = (char*)malloc(sizeof(char) * numOfArrayElementsToConvert);
for(int i =0;i<numOfArrayElementsToConvert;i++){
   s[i] = itoa(arr[i]);
}

int var = atoi(s);