Implement atoi which converts a string to an integer. The function first discards as many whitespace characters as necessary until the first non-whitespace character is found. Then, starting from this ...

if(ch == ' '){if(i != 0 && s[i-1] != ' ') break; continue;} else if(ch == '-'){if(i != 0 && s[i-1] != ' ') break; neg = true;} else if(ch == '+'){if(i != 0 && s[i-1 ...