Answer Posted / koshy

#include "stdio.h"
main()
{
char str="hello world";
char i,j,a,b,len;

len=((const char *)str);
printf("char to be inserted:");
scanf("%d",&a);

printf("at position");
scanf("%d",&b);

for(i=0;i<len;i++)
{
temp=str[b];
str[b]=a;
str[b+1]=temp;
for(j=b+1;(j<len) &&(str[j]!=0);j++)
{
str[j+1]=str[j];
}

}






}

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