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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <string.h>
  4.  
  5. char **concancate_string(const char *name[], const char *subject[], size_t n) {
  6.     char **destin = malloc(n * sizeof *destin);
  7.     for (int i = 0; i < n; i++) {
  8.         destin[i] = malloc(strlen(name[i]) + strlen(subject[i]) + 3 + 1); // add space for " : " and terminating '\0'
  9.         sprintf(destin[i], "%s : %s", name[i], subject[i]);
  10.     }
  11.     return destin;
  12. }
  13.  
  14. int main(void) {
  15.     char *name[] = {"michel", "sam", "roy", "romi"};
  16.     char *subject[] = {"physics", "math", "chemistry", "biology"};
  17.     char **foo = concancate_string(name, subject, 4);
  18.     for (int i = 0; i < 4; i++) printf("%s\n", foo[i]);
  19.     for (int i = 0; i < 4; i++) free(foo[i]);
  20.     free(foo);
  21. 	return 0;
  22. }
  23.  
Success #stdin #stdout 0s 9424KB
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stdin
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Standard input is empty
stdout
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michel : physics
sam : math
roy : chemistry
romi : biology
https://ideone.com/3Qb7v1
concancate_string
language:
C (gcc 8.3)
created:
6 years ago
visibility:
secret

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