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Atoi test
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//gcc 5.4.0 #include <stdio.h> int ft_isdigit(int c) { if (c >= '0' && c <= '9') return (1); return (0); } int ft_isspace(int c) { if (c == ' ' || c == '\f' || c == '\n' || c == '\r' || c == '\t' || c == '\v') return (1); return (0); } int ft_atoi(const char *str) { int i; int res; int sign; i = 0; res = 0; sign = 1; while (ft_isspace(str[i]) == 1) i++; if (str[i] != '-' && str[i] != '+' && ft_isdigit(str[i]) == 0) return (0); if (str[i] == '-') sign = -1; if (ft_isdigit(str[i]) == 0) i++; while (ft_isdigit(str[i]) == 1) { res = res * 10 + (str[i] - '0'); i++; } return (res * sign); } int main(void) { printf("Real atoi: %d\n", ft_atoi("-999999999999999")); printf("My atoi: %d\n", ft_atoi("-999999999999999")); return 0; }
gcc
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Compilation time: 0.24 sec, absolute running time: 0.1 sec, cpu time: 0.03 sec, memory peak: 3 Mb, absolute service time: 0,34 sec
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Real atoi: 1530494977 My atoi: 1530494977