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Join strings revitalised strlen and strcat

#include <stdio.h> #include <string.h> #define STR_LENGTH 60 void main() { char str1[STR_LENGTH] = "String Sample"; char str2[STR_LENGTH] = ",String Sample"; if(STR_LENGTH > strlen(str1) + strlen(str2)) /* Enough space ? */ printf("\n%s\n", strcat(str1, str2) ); /* yes, so print joined string */ else printf("\n no enough room."); }