Can we concatenate two character and store in another char or character array to print a string in C ?

Question

as like:
char str[]={"aabababcab"};
char p=str[1];
char q=str[2];
char r=strcat(p,q);
printf("%c",r);. //%s

desirable output is:. ab

Answer 1

Sorry but strcat append a string to another one and dont that you think...
You can use the strncpy function for this http://www.cplusplus.com/reference/cstring/strncpy/ or better make all " to hand"

char str[]= "aabababcab";
char r[3]={0};
// r is 3 size for contain null
// terminator char

// strncpy way
strncpy(r, str+1, 2);

// or using direct copy
r[0]=str[1];
r[1]= str[2];