52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
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#include <stdio.h>
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#include <stdlib.h>
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static int addIntOvf(int result, int a, int b) {
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result = a + b;
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if(a > 0 && b > 0 && result < 0)
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return -1;
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if(a < 0 && b < 0 && result > 0)
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return -1;
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return 0;
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}
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int main() {
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int num1, num2, sum;
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FILE *flag;
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char c;
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printf("n1 > n1 + n2 OR n2 > n1 + n2 \n");
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fflush(stdout);
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printf("What two positive numbers can make this possible: \n");
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fflush(stdout);
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if (scanf("%d", &num1) && scanf("%d", &num2)) {
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printf("You entered %d and %d\n", num1, num2);
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fflush(stdout);
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sum = num1 + num2;
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if (addIntOvf(sum, num1, num2) == 0) {
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printf("No overflow\n");
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fflush(stdout);
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exit(0);
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} else if (addIntOvf(sum, num1, num2) == -1) {
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printf("You have an integer overflow\n");
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fflush(stdout);
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}
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if (num1 > 0 || num2 > 0) {
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flag = fopen("flag.txt","r");
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if(flag == NULL){
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printf("flag not found: please run this on the server\n");
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fflush(stdout);
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exit(0);
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}
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char buf[60];
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fgets(buf, 59, flag);
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printf("YOUR FLAG IS: %s\n", buf);
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fflush(stdout);
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exit(0);
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}
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}
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return 0;
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}
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