60 lines
1.3 KiB
C
60 lines
1.3 KiB
C
#include <string.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdio.h>
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#include <assert.h>
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#include <stdbool.h>
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int solution(char *str) {
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static const size_t LEN = 3;
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static const char* one = "one";
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static const char* two = "two";
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int operand[2] = {0, 0};
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int operand_index = 0;
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char op = 0x00;
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char* ptr = str;
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while (*ptr != '\0') {
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int cmp = strncmp(ptr, one, LEN);
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if (cmp == 0) {
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operand[operand_index++] = 1;
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ptr += LEN;
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}
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cmp = strncmp(ptr, two, LEN);
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if (cmp == 0) {
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operand[operand_index++] = 2;
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ptr += LEN;
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}
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if (operand_index == 2) {
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operand_index = 0;
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int a = operand[0];
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int b = operand[1];
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int res = 0;
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if (op == '+') res = a + b;
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else res = a - b;
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operand[operand_index++] = res;
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}
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if (*ptr == '+') {
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op = '+';
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} else if (*ptr == '-') {
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op = '-';
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} else {
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assert(true && "Invalid parsing!");
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}
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++ptr;
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}
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return operand[0];
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}
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int main() {
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char* str = "one+two-one-one+two+one";
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int ret = solution(str);
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printf("input: %s = %d\n", str, ret);
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return 0;
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}
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