The character string by the pointer is declared and initialized as follows.
char *p = "String";
Each of the pointer p and the string literal "String" occupy storage. Pointer p is the point that points to the first character of the string. By the way, the array name also refers to the first character.
char *p[] = {"C","JavaScript","swift"};
| function | function |
|---|---|
| strlen(s); | Find the length of the string |
| strcpy(s1,s2); | Copy the string from s2 to s1 |
| strncpy(s1,s2,n); | Set a limit on the number of characters that can be copied to strcpy |
| strcat(s1,s2); | Concatenate strings |
| strncat(s1,s2,n); | It is possible to set a limit on the number of characters that can be connected to strcat |
| strcmp(s1,s2); | Find the magnitude relationship of character strings.Positive integer value if s1 is greater than s2,0 if equal,Negative integer if s2 is less than s1 |
| atoi(nptr) | The character string pointed to by nptr,Convert to int type representation. |
| atol(nptr) | The character string pointed to by nptr,Convert to long type representation. |
| atof(nptr) | The character string pointed to by nptr,Convert to double type representation. |
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