#include #include #include #include char num1[1048576], num2[1048576], total[1048576]; char num1_temp[1048576], num2_temp[1048576]; char n_ram[2]; char input[1048576]; char oprator_sign; int is_num1_negative = 0, is_num2_negative = 0, i = 0, dec1 = 0, dec2 = 0; void add(char *n1, char *n2, char *sum); void substract(char *n1, char *n2, char *sum); void multiply(char *n1, char *n2, char *sum); void divide(char *n1, char *n2, char *sum); void strrev(char *str); void itoa(int a, char *out, int cnst); void oprator(); void numbers(); void print_answer(); int highest(char *n1, char *n2); void clear_zero(char *string); int main() { printf("Enter X to exit.\n"); i = 0; while (input[i] != '\0') { input[i] = '\0'; i++; } i = 0; while (num1[i] != '\0') { num1[i] = '\0'; i++; } i = 0; while (num2[i] != '\0') { num2[i] = '\0'; i++; } i = 0; while (total[i] != '\0') { total[i] = '\0'; i++; } i = 0; scanf("%s",input); if (strcmp(input, "x") == 0 || strcmp(input, "X") == 0) { abort(); } int k = 0; total[k] = input[i]; k++; i++; while (isdigit(input[i])!=0||input[i]=='.') { total[k] = input[i]; i++; k++; } numbers(); } void print_answer() { strcpy(num1_temp, ""); if (input[i] != '\0') { printf("=%s\n", total); numbers(); } else { if (strcmp(total, "") == 0 || strcmp(total, "-") == 0) strcpy(total, "0"); printf("=%s\n", total); } main(); } void numbers() { int j = 0, k = 0; int m = 0, n = 0, o = 0; dec2 = 0; dec1 = 0; is_num1_negative = 0; if (total[m] == '-') { printf("%c", total[m]); is_num1_negative = 1; m++; } while (num1[j] != '\0') { num1[j] = '\0'; j++; } j = 0; while (num2[j] != '\0') { num2[j] = '\0'; j++; } j = 0; while (isdigit(total[m])!=0||total[m]=='.') { printf("%c", total[m]); if (total[m] == 46) { n = 1; m++; printf("%c", total[m]); } if (n == 1) { dec1++; } num1[o] = total[m]; m++; o++; } clear_zero(num1); while (total[j] != '\0') { total[j] = '\0'; j++; } j = 0; is_num2_negative = 0; oprator_sign = input[i]; printf("%c", oprator_sign); i++; if (input[i] == '-') { printf("%c", input[i]); is_num2_negative = 1; i++; } while (isdigit(input[i])!=0||input[i]=='.') { printf("%c", input[i]); if (input[i] == 46) { k = 1; i++; printf("%c", input[i]); } if (k == 1) { dec2++; } num2[j] = input[i]; i++; j++; } clear_zero(num2); oprator(); } void oprator() { switch (oprator_sign) { case '+': add(num1, num2, total); break; case '-': substract(num1, num2, total); break; case '*': multiply(num1, num2, total); break; case '/': divide(num1, num2, total); break; default: printf("Fundamental Error!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"); abort(); break; } } void add(char *n1, char *n2, char *sum) { if (oprator_sign == '+') { if (dec1 < dec2) { while (dec1 != dec2) { strcat(n1, "0"); dec1++; } } else { while (dec2 != dec1) { strcat(n2, "0"); dec2++; } } if (is_num2_negative == 1 && is_num1_negative == 0) { substract(n1, n2, sum); goto add_print; } if (is_num1_negative == 1 && is_num2_negative == 0) { substract(n1, n2, sum); goto add_print; } } int aa = 0, ab = 0, ac = 0, ae = 0, af = 0; int a_temp1 = 0, a_temp2 = 0, a_extra = 0, a_sum = 0, a_print = 0; char n1_ram[2], n2_ram[2], sum_ram[2]; aa = strlen(n1); ab = strlen(n2); if (aa < ab) { ac = ab; } else { ac = aa; } for (ae = ac; ae > 0; ae--) { aa--; ab--; if (aa < 0) { n2_ram[0] = n2[ab]; a_temp1 = 0; a_temp2 = atoi(n2_ram); } else { if (ab < 0) { n1_ram[0] = n1[aa]; a_temp1 = atoi(n1_ram); a_temp2 = 0; } else { n1_ram[0] = n1[aa]; n2_ram[0] = n2[ab]; a_temp1 = atoi(n1_ram); a_temp2 = atoi(n2_ram); } } a_sum = a_temp1 + a_temp2 + a_extra; a_extra = a_sum / 10; a_print = a_sum % 10; itoa(a_print, sum_ram, 10); strcat(sum, sum_ram); } if (a_extra != 0) { itoa(a_extra, sum_ram, 10); strcat(sum, sum_ram); } add_print: strrev(sum); clear_zero(sum); if (oprator_sign == '+') { if (dec1 != 0 || dec2 != 0) { af = 0; ae = 0; ae = strlen(sum); af = ae - dec1; n1_ram[0] = sum[af]; sum[af] = 46; while (af < ae) { af++; n2_ram[0] = sum[af]; sum[af] = n1_ram[0]; n1_ram[0] = n2_ram[0]; } } if (sum[0] == 46) { strrev(sum); strcat(sum, "0"); strrev(sum); } strrev(sum); if (is_num1_negative == 1 && is_num2_negative == 1) strcat(sum, "-"); if (is_num1_negative == 1 && is_num2_negative == 0 && highest(n1, n2) == 1) strcat(sum, "-"); strrev(sum); print_answer(); } } void substract(char *n1, char *n2, char *sum) { if (is_num1_negative == 1 && is_num2_negative == 1) { strcpy(sum, n1); strcpy(n1, n2); strcpy(n2, sum); strcpy(sum, ""); } if (oprator_sign == '-') { if (dec1 < dec2) { while (dec1 != dec2) { strcat(n1, "0"); dec1++; } } else { while (dec2 != dec1) { strcat(n2, "0"); dec2++; } } if (is_num1_negative == 0 && is_num2_negative == 1) { add(n1, n2, sum); goto sub_print; } if (is_num1_negative == 1 && is_num2_negative == 0) { add(n1, n2, sum); goto sub_print; } } int sa = 0, sb = 0, sc = 0, se = 0, sd = 0; int s_temp1 = 0, s_temp2 = 0, s_extra = 0, s_sum = 0, s_print = 0; char n1_ram[2], n2_ram[2], sum_ram[2]; if (highest(n1, n2) == 1) { strcpy(sum, n1); strcpy(n1, n2); strcpy(n2, sum); sa = 0; while (sum[sa] != '\0') { sum[sa] = '\0'; sa++; } s_print = 1; } sa = strlen(n1); sb = strlen(n2); if (sa < sb) { sc = sb; } else { sc = sa; } for (se = sc; se > 0; se--) { sa--; sb--; if (sa < 0) { n2_ram[0] = n2[sb]; s_temp1 = 0; s_temp2 = atoi(n2_ram); } else { if (sb < 0) { n1_ram[0] = n1[sa]; s_temp1 = atoi(n1_ram); s_temp2 = 0; } else { n1_ram[0] = n1[sa]; n2_ram[0] = n2[sb]; s_temp1 = atoi(n1_ram); s_temp2 = atoi(n2_ram); } } s_temp1 = s_temp1 - s_extra; if (s_temp1 < s_temp2) { s_sum = s_temp1 + 10 - s_temp2; s_extra = 1; } else { s_sum = s_temp1 - s_temp2; s_extra = 0; } itoa(s_sum, sum_ram, 10); strcat(sum, sum_ram); } strrev(sum); clear_zero(sum); if (oprator_sign == '+') strrev(sum); sub_print: if (oprator_sign == '-') { if (dec1 != 0 || dec2 != 0) { sd = 0; se = 0; se = strlen(sum); sd = se - dec1; while (sd < 0) { strrev(sum); strcat(sum, "0"); strrev(sum); sd++; } se = strlen(sum); n1_ram[0] = sum[sd]; sum[sd] = 46; while (sd != se) { sd++; n2_ram[0] = sum[sd]; sum[sd] = n1_ram[0]; n1_ram[0] = n2_ram[0]; } } if (sum[0] == 46) { strrev(sum); strcat(sum, "0"); strrev(sum); } strrev(sum); if (s_print == 1 && is_num1_negative == 0 && is_num2_negative == 0) strcat(sum, "-"); if (s_print == 0 && is_num1_negative == 1 && is_num2_negative == 1) strcat(sum, "-"); if (s_print == 0 && is_num1_negative == 1 && is_num2_negative == 0) strcat(sum, "-"); strrev(sum); print_answer(); } } void multiply(char *n1, char *n2, char *sum) { int ma = 0, mb = 0, mc = 0; char dec_ram[2]; strcpy(n_ram, ""); mb = strlen(n2); strcpy(num1_temp, ""); strcpy(num2_temp, ""); while (mb > 0) { mb--; n_ram[0] = n2[mb]; ma = atoi(n_ram); while (ma > 0) { ma--; add(n1, num2_temp, num1_temp); strcpy(num2_temp, num1_temp); if (ma > 0) strcpy(num1_temp, ""); else strcpy(num2_temp, ""); } strcat(n1, "0"); add(num1_temp, num2_temp, sum); strcpy(num2_temp, sum); strcpy(num1_temp, ""); if (mb > 0) strcpy(sum, ""); } clear_zero(sum); if (dec1 != 0 || dec2 != 0) { mb = 0; mc = strlen(sum); mb = mc - dec1 - dec2; while (mb < 0) { strrev(sum); strcat(sum, "0"); strrev(sum); mb++; if (mb < 0) mc++; } n_ram[0] = sum[mb]; sum[mb] = 46; while (mb != mc + 1) { mb++; dec_ram[0] = sum[mb]; sum[mb] = n_ram[0]; n_ram[0] = dec_ram[0]; } } if (sum[0] == 46) { strrev(sum); strcat(sum, "0"); strrev(sum); } if (oprator_sign != '*') return; strrev(sum); if (is_num1_negative == 1 && is_num2_negative == 0) { strcat(sum, "-"); } if (is_num1_negative == 0 && is_num2_negative == 1) { strcat(sum, "-"); } strrev(sum); print_answer(); } void divide(char *n1, char *n2, char *sum) { int da = 0, db = 0, dc = 0, dd = 0, de = 0; strcpy(n_ram, ""); while (dec1 != 0) { strcat(n2, "0"); dec1--; } while (dec2 != 0) { strcat(n1, "0"); dec2--; } while (num1_temp[de] != '\0') { num1_temp[de] = '\0'; de++; } de = 0; while (num2_temp[de] != '\0') { num2_temp[de] = '\0'; de++; } de = 0; strcpy(num2_temp, ""); dd = strlen(n1) + 1; strcat(n1, "0000000000"); da = strlen(n1); if (strcmp(n2, "") == 0) { printf("Can't Divide by 0"); abort(); } while (db != da) { n_ram[0] = n1[db]; strcat(num1_temp, n_ram); db++; while (highest(num1_temp, n2) == 0) { substract(num1_temp, n2, num2_temp); strcpy(num1_temp, num2_temp); while (num2_temp[de] != '\0') { num2_temp[de] = '\0'; de++; } de = 0; dc++; } if (db == dd) { strcat(sum, "."); } itoa(dc, n_ram, 10); strcat(sum, n_ram); clear_zero(num1_temp); dc = 0; } clear_zero(sum); strrev(sum); if (is_num1_negative == 1 && is_num2_negative == 0) { strcat(sum, "-"); } if (is_num1_negative == 0 && is_num2_negative == 1) { strcat(sum, "-"); } strrev(sum); if (sum[0] == '.') { strrev(sum); strcat(sum, "0"); strrev(sum); } print_answer(); } int highest(char *n1, char *n2) { int result = 0; int ha = 0, hb = 0, hc = 0, h_temp1 = 0, h_temp2 = 0; char n1_ram[2], n2_ram[2]; ha = strlen(n1); hb = strlen(n2); if (ha < hb) { result = 1; } else { if (ha == hb) { for (hc = 0; hc <= ha; hc++) { n1_ram[0] = n1[hc]; n2_ram[0] = n2[hc]; h_temp1 = atoi(n1_ram); h_temp2 = atoi(n2_ram); if (h_temp1 < h_temp2) { result = 1; break; } else { if (h_temp1 > h_temp2) { result = 0; break; } else { if (h_temp1 == h_temp2) continue; } } } } } return result; } void clear_zero(char *string) { int c1 = 0, c2 = 0; while (string[c1] == '0') { c1++; } if (c1 > 0) { while (string[c2] != '\0') { string[c2] = string[c1]; c2++; c1++; } } } void strrev(char *str) { int len = 0; int i = 0; char temp; len = strlen(str) - 1; for (i = 0; i < strlen(str) / 2; i++) { temp = str[i]; str[i] = str[len]; str[len--] = temp; } } void itoa(int a, char *out, int cnst) { int b = a + 48; out[0] = b; out[1] = '\0'; }

Large Number Calculator