Question

C code only!

Complete this function so that the function str2int convert the char array s into its equivalent integer value. The char array has only digit characters of{0, 1, .., 9}and ’\0’.And the first element is not 0, which means, the integer string in the char array is of base 10.

For example, if we pass chars[] = ”123” intostr2int, then it should return 123.Close the braces when you are done

int str2int(char s[]){

Answer 1

#include <stdio.h>

int str2int(char s[]){
    int length = 0, i, prod = 1, result = 0;
    // calculating length of string s
    while(s[length]!='\0')
        length++;
    for(i = length-1;i>=0;i--){
        result += (prod*(s[i]-'0'));
        prod = prod * 10;
    }
    return result;
}

int main()
{
    char s[] = "123";
    int result = str2int(s);
    printf("%d",result);
    return 0;
}

123