Scan a Character win a string and replace it if its available

#include<'stdio.h'>

main()
{
char name[20];
//input
printf("enter the name : ");
scanf("%s",&name);

//out
printf("**%s** \n",name);

//count
int count=1;
for(count=0;name[count]!='\0';count++);
printf("count %d \n",count);

flushall();

/*
char n;
printf("enter the letter : ");
scanf("%c",&n);

int ncount = 0, i =0;
for(i=0;i<=count;i++)
if(name[i]==n)
ncount++;

printf("ncount %d \n",ncount);*/


//scanng lettr
char n;
printf("enter the letter (scan) : ");
scanf("%c",&n);
flushall();

//replacing letter
char m;
printf("enter the letter (replace): ");
scanf("%c",&m);

int i =0;
for(i=0;i<=count;i++)
if(name[i]==n)
name[i]=m;

printf("%s",name);




}