atoi字符串转数字

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
//atoi字符串转数字
void test()
{
    char ptr1   [] = "-12345.12";
    char ptr2  []= "+1234w34";
    char ptr3  []   = "   456er12";
    char ptr4   []  = "789 123";
    int a, b, c, d;

    a = atoi(ptr1);
    b = atoi(ptr2);
    c = atoi(ptr3);
    d = atoi(ptr4);

    printf("a = %d, b = %d, c = %d, d = %d\n", a, b, c, d);


}
int main()
{
	test();
	return 0;
}