你可以在c中将int变量放入字符串吗？

Question

Can you put an integer from a variable, for example:

int i=17;
char array[]= i;

and now i want to have

array[3]= {1,7,\0}

I know it doesn't work this way but i dont know how to do it without some special functions, which i dont want to use. Thank you for your help.

this is what i came up with:

char array[];
    int counter = 172; //the number i want to put into string
    int i= 0;
    int p=0;
    float c = counter;
    int k=0, g=0, h=0;

    while(counter !=0){
        counter = counter /10;
        c= c/10;    
        p++;
    }
    while(p !=0){
        c=c*10;
        k=c;
        h= k-g;
        g=k*10;
        array[i] = h;
        i++;
        p--;
    }
    array[i]= '\0';

Answer 1

Use sprintf(buffer, "%d", i);

Make sure that buffer is long enough to contain any possible number-string and the terminating \\0 byte.

sprintf accepts everything that printf does, but sends its output to a string buffer instead of STDOUT.

Answer 2

If you really don't want to use sprintf, then here is a sample code snippet for you.

    #define BASE 10
    #define MAXLEN 10
    int val = 153;
    char valstr[MAXLEN];

    //Reverse the int
    int valcpy = val;
    int valrev = 0;
    while(valcpy) {
        valrev *= BASE;
        valrev += valcpy % BASE;
        valcpy /= BASE;
    }

    //Convert to string
    int i = 0;
    while(valrev) {
        valstr[i] = valrev % BASE + '0';
        valrev /= BASE;
        i++;
    }
    valstr[i] = '\0';

    printf("%d = %s", val, valstr); //prints 153 = 153