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  1. # include <stdio.h>
  2.  
  3. void myStrcat(char s[], char t[]){
  4. int i=0;
  5. int j=0;
  6. while(s[i]!='\0'){
  7. i++;
  8. }
  9. while(t[j]!='\0'){
  10. s[i+j]=t[j];
  11. j++;
  12. }
  13. }
  14.  
  15. int main(){
  16. char s[100];
  17. char t[100];
  18. scanf("%s %s",s,t);
  19. printf("%s + %s",s,t);
  20. myStrcat(s,t);
  21. printf(" -> %s\n",s);
  22. return 0;
  23. }
  24.  
Success #stdin #stdout 0s 5284KB
stdin
abcde fg
stdout
abcde + fg -> abcdefg