Find the Error : Reverse the word in its position

Question

I want to reverse the word in its position but output is not correct can anyone help me to find the error in my code.
ex: samir singh : rimas hgnis

************MY CODE IS******

#include<stdio.h>
#include<string.h>
int main()
{
char str[]="Samir Singh";
int i,j,start,end=0;
int l=strlen(str);
for(i=0; str[i]!='\0'; i++)
{
if(str[i]==' ' || i==l)
{
if(str[i]==' ') start=i-1;
else start=l-1;
for(j=start; j>=end; j--)
{
printf("%c",str[j]);
}
end=start+2;
printf(" ");
}
}
return 0;
}

Answer 1

You can use this function. Just pass the string you want to reverse as argument, and it will reverse the string.

void reverse( char* str )
{
char swap;
size_t left = 0, // left index
right = strlen( str ) - 1; // right index

while( left != right )
{
swap = str[ left ];
str[ left ] = str[ right ];
str[ right ] = swap;
left++; right--;
}
}