I wrote a program that inputs a string with spaces between them and should allocate a new string with only 1 space between the words. and I was wondering if there’s a better way to write it ( I rewrote it a couple of times and I’m trying to find the most effective way to write this code) anyway this is it:

#define _CRT_SECURE_NO_WARNINGS #define SIZE 80 #include <stdio.h> #include <string.h> #include <stdlib.h>   char* UpgradeString(char* oldText); void inputStr(char* str); int main() {     char str[SIZE], *ans;     printf("Enter string\n");     inputStr(str);      ans = UpgradeString(str);     puts(ans);  } void inputStr(char* str) {     int i = 0;     fgets(str, SIZE - 1, stdin);     while (str[i] != '\n')i++;     str[i] = 0;  } char* UpgradeString(char* oldText) {     char temp[SIZE], *ans;     int i=0, k = 0;      while (1)     {         if (oldText[i] == 0)break;         if (oldText[i] != ' ')         {             temp[k] = oldText[i];             k++;         }         if (oldText[i] == ' '&&(oldText[i + 1] != ' '&&oldText[i + 1] != 0))         {             temp[k] = oldText[i];             k++;         }         if (oldText[i] == ' ')i++;         else i++;     }     temp[k] = 0;     ans = (char*)malloc(sizeof(char)*(strlen(temp) + 1));     strcpy(ans, temp);     return ans;  } 

thanks for the help!