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#include <stdio.h>
 
int main() 
{
/* variable definition: */
         int day;
         float amount, total saved;
/* initialize */
	int day = 1;
	float amount = 0.0;
 
    while(day<= 31){
    	printf("day:%d \t amount:$%.2f \n", day, amount);
    	amount *= 2;
    	day = day +1;
    }
	return 0;
}
 
 
 

prog.c: In function ‘main’:
prog.c:7:30: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘saved’
          float amount, total saved;
                              ^~~~~
prog.c:9:6: error: redeclaration of ‘day’ with no linkage
  int day = 1;
      ^~~
prog.c:6:14: note: previous declaration of ‘day’ was here
          int day;
              ^~~
prog.c:10:8: error: redeclaration of ‘amount’ with no linkage
  float amount = 0.0;
        ^~~~~~
prog.c:7:16: note: previous declaration of ‘amount’ was here
          float amount, total saved;
                ^~~~~~

Standard output is empty