strncmp
From cppreference.com
| Defined in header <string.h>
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| int strncmp( const char *lhs, const char *rhs, size_t count ); |
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Compares at most count characters of two null-terminated byte strings. The comparison is done lexicographically.
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[edit] Parameters
| lhs, rhs | - | pointers to the null-terminated byte strings to compare |
| count | - | maximum number of characters to compare |
[edit] Return value
Negative value if lhs is less than rhs.
0 if lhs is equal to rhs.
Positive value if lhs is greater than rhs.
[edit] Example
Run this code
#include <string.h> #include <stdio.h> int main(void) { const char* string = "Hello World!"; const int size = strlen(string); //Matches int a = strncmp(string, "Hello World!", 5); if (a == 0) { printf("The 5 first char of each string are matching.\n"); } //Greater than int b = strncmp(string, "Hello", size); if (b >= 1) { printf("Left hand side is bigger than right hand side.\n"); } //less than int c = strncmp(string, "Hello there world!", size); if (c <= -1) { printf("Left hand side is smaller than right hand side.\n"); } }
Output:
The 5 first char of each string are matching. Left hand side is bigger than right hand side. Left hand side is smaller than right hand side.
[edit] See also
| compares two strings (function) | |
| compares two buffers (function) | |
| compares two strings in accordance to the current locale (function) | |
| C++ documentation for strncmp
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