How can i make C program that scans user's input(text) and save it on a dynamic string -

i want read input user(text) using c program , here code:

#include <stdio.h> #include <stdlib.h> #include <string.h>  int main(){     int i=0,x=0;     char *c;     c[i]=(char*)malloc(sizeof(char));     while(1){         c[i]=getc(stdin);         if(c[i]=='\n')             break;         i++;         realloc(c, i+1 );     }     c[i]='\0';     //printf("\n%d",strlen(c));     printf("\n\n%s",c); return 0; } 

this program when compiles there 1 warning @ c[i]=(char*)malloc(sizeof(char));:

warning: assignment makes integer pointer without cast [enabled default]

this program works succesfully if remove x=0 code there is:

segmentation fault (core dumped)

what should change on code can work without warnings or useless random variable x=0 work.

thank you!

as said @dabo, adjust assignment.

c = malloc(sizeof(char)); 

following additional suggestions:

#include <stdio.h> #include <stdlib.h> #include <string.h>  int main() {     // use size_t rather int index     size_t i=0;     char *c;     c = malloc(1);     if (c == null) return 1; // out of memory       while(1){         // detect eof condition, use type `int` get() result         int ch = getc(stdin);         if(ch == eof || ch == '\n') {             break;         }         c[i++] = ch;         // important, test & save new pointer          char *c2 = realloc(c, i+1 );         if (c2 == null) return 1; // out of memory           c = c2;     }     c[i] = '\0';     // use %zu when printing size_t variables     printf("\n%zu",strlen(c));     printf("\n\n%s",c);     // practice allocated free memory     free(c);    return 0; } 

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edit: fixed